In the Trigun manga, the Gung-Ho Guns were very equal-opportunity in employing all manner of disabilities and lifestyles (a paraplegic, a quadriplegic, a gang of midgets, a child who's really a sandworm, but point stands, a one-eyed woman, a transvestite, a samurai, a man with split personality, their own musician...) As long as they were sufficiently villainous and ruthless, Knives didn't care since he doesn't care enough about humans to discriminate.
In Berserk, the Big Bad, Griffith, allows people from all walks of life to join his army, including demons, commoners, soldiers from nearly every neighboring country, and even people from the nation of Kushan that he is currently fighting against.
Aizen enlisted Kaname Tosen, a blind black guy (because of his blindness), GinIchimaru amongst Soul Reapers. He also enlisted the Espada, pictured above, including female Dark-Skinned Blonde Halibel; Nnoitora, a sexist; and Ulquiorra, the very-white "saddest clown in the world" nihilist, among others. Really, the only thing they have in common is that they're all named after corruptions of architects and designers.
The Vandenreich hunt hollows and hate shinigami. That hasn't stopped them forcibly enlisting Arrancar-level hollows and asking certain high-powered shinigami to join their ranks. More than a few Arrancar accepted being recruited, others did not. So far, the shinigami that was asked Aizen has refused.
One Piece gives us Sir Crocodile, who has hired a black man, a flamboyant transvestite, old people, and every male member of his team has completely equal female partner, including himself. Sure he may be evil, but at least he isn't prejudiced! Well, the transvestite doesn't have a partner. He considered himself his own partner in that regard.
Doflamingo's crew is just as diverse as Crocodile's. There are people of all ages, both genders and all levels of weirdness.
In Naruto, Orochimaru's Sound Four are a fat guy, A brown six armed person, a woman who curses like a sailor, two persons not completely unlike Siamese Twins, and the leader is a terminally ill guy.
In-Universe there is Akatsuki, who employ members from almost every countrynote As the Raikage points out, no Cloud ninjas are in Akatsuki and every member has an completely different philosophy (humorously, the members with opposite philosophies are paired together). That's to say nothing of the plant, the human-shark hybrid, and the puppet that they accepted into their ranks.
The computerized Dream Future executive branch of 'Net Ghost Pipopa' is composed of American, European, Asian and North African members.
The DUCK organization from Tsuritama. The top brass has black, Arabic, and Asian members, as well as a great gender ratio, and their lead agent, Akira, is Indian.
In the 1980s and 1990s, Marvel's Serpent Society fit this trope to a T. From the group's inception, about half of them were women — and supervillain teams have tended to be boys' clubs. There were several black members, at least one Hispanic member, and at least one Middle Eastern member. The Society also welcomed disabled people: Death Adder was mute, Rattler was deaf, and Bushmaster was an amputee. (The last was a case of Disability Superpower, as he'd replaced his missing limbs with super-strong cybernetic parts.)
HYDRA themselves would count, since they've been shown to have female and non-white members. Baron Strucker Lampshaded this at one point by noting that with age, his penchant for racism and eugenics had faded. Now he embraces the idea of diversity...because that just means more loyal subjects beneath his boot when he finally conquers the world.
Both played straight and subverted with many of the X-Men's enemies. While both the human bigots and mutant supremacists actively hate and discriminate against the "other side", their own memberships are often depicted as otherwise ethnically diverse. The subversion comes with the fact that they're hatemongers against either humans or mutants, and yet have no problem accepting members from many different ethnic backgrounds.
In The DCU, Kobra might be a bunch of crazy murderous cultist with a snake fetish, but they pride themselves on understanding that "the serpent comes in many colours." Apparently serpent-obsessives have no time for prejudice.
The Red Skull (well, his clone) is the leader of a team of "superheroes" dubbed the S-Men in Uncanny Avengers. The team is very diverse, with a membership drawing from places as far off as Greece and Ethiopia. Lampshaded in that the Red Skull is still a horrible bigot, and only assembled such a diverse group to help sway the general public against his current target; mutants.
Discussed in House of M, an Alternate Universe story where Magneto and his army managed to conquer the world. Thunderbird mentions that he joined Magneto's cause precisely because of the racism he suffered as an American Indian, a form of discrimination that he no longer experiences in a world run by mutants.
Lampshaded in Marvel's Runaways number 7, our heroes are doing some survival shoplifting. Upon arrival, Nico isn't convinced about their disguises. "We look like those politically correct, multi-ethnic gangs that only rob people on bad TV shows."
The Marvel Star Wars series of the late 1970s and 1980s probably has more female antagonists than the rest of the Star Wars Expanded Universe combined. Lumiya is by far the most famous but there are many others ranging from serious villainesses like Kharys to one issue annoyances like Captain Traal. There are even a couple of nameless female Mooks! The contrast with later writers is really quite startling.
In Legacy both the Fel Empire and the reborn Sith Empire are far more diverse than the Empire and the Sith seen in the films, with both readily accepting women and non-humans into their ranks. This is particularly notable with the Fel Empire, as the earlier incarnation of the Galactic Empire under Palpatine was openly prejudiced against non-humans.
The Punisher special from the mid-90s Empty Quarter featured a convention of every newsworthy terrorist organization of the time. Their brilliant plan was to switch targets, so some survivalist militia would bomb the Vatican on behalf of Hezbollah. Apparently all those Catholic IRA members were cool with this.
In The Jaded Eyes Series while Harry/Tristan hates Muggles he's friends with and strives for the rights of Magical Creatures. His followers are mostly non-human magic users such as elemantals, satyrs, furies, gargoyles, werewolves, and vampires.
Bad Future Crusaders: Twilight Sparkle, who has become a tyrannical despot and turned Equestria into a Police State, nevertheless employs Changelings (who are universally despised) as her spy network, and has ponies of both genders in her Royal Guard (which in canon appears to be entirely composed of stallions). Astringe, the artist whose pictures the story is adapted from, lampshaded this with the following comment:
"Also too, I had a thought when Scootaloo and Apple Bloom passed a pair of guards and one was a woman. Twilight's army is unisex? How come the bad guys in these kinds of stories are always the most progressive?"
The Rise Of Darth Vulcan: Vulcan's criminal enterprise includes diamond dogs, changelings, escaped pony convicts, and minotaurs.
Belladonna: Think of my organization as an equal opportunity employer. No matter who you are or what you want to be; when you join with me, it's always an easy ride.
In The Lion King, Scar generally gets along with the hyenas (though being a snob, he looks down on everyone) and is more than willing to employ them in his plans to take the throne, and integrates them into the Pride Lands after becoming king, whereas the other "good" lions are pretty big pricks to them. Additionally, going by the voice actors, the hyenas Shenzi, Banzai and Ed are respectively black, Hispanic and white.
Rango has a gang of bad guys comprised of a British or possibly Australian gila monster, a Mexican lizard(?), and a Swedish(?) rabbit.
Films — Live-Action
Death Wish 3 portrays all the street gangs of New York as multiethnic. In Death Wish 2 the gang of scum includes two white, two black, and one Hispanic member, all buddies.
La Haine features three poor French criminals working together: Vinz (Jewish), Hubert (black African) and Sayid (a North African Muslim).
The Street Fighter movie has Bison recruit minions and henchmen from all over the world, the end of the movie even has a joke segment using national stereotypes to make fun of his international regiments.
Spoofed in Blazing Saddles: The villain's "Thugs Wanted" ads specify that he's "An Equal Opportunity Employer", and it includes several representatives from hate groups like The Klan and the Nazis.
Lamarr: I want you to round up every vicious criminal and gunslinger in the west. Take this down.
(Taggart looks for a pen and paper while Hedley talks)
The thousand armies of the Persian Empire in 300 seem to encompass every non-Greek race living in the Old World at the time — from actual Persians, to black Africans, to...orc ninja samurai? Historically speaking, the Achaemenid Persian empire was gigantic (that's them in brown there◊) and frequently levied large numbers of troops from its conquered territories.
Carl Grissom's criminal syndicate in the 1989 film was also remarkably diverse, containing representatives with stereotypically Italian, Jewish, and Chinese facial features; when The Joker takes over this gang, he hires a Black kung-fu expert (by far his most lethal henchman) and adds him to the mix. Inverted with Lieutenant Eckhardt's squad of crooked cops, who are all white; Commissioner Gordon, meanwhile, has at least two Black men working for him, one of whom appears to have the rank of captain.
Clarence Boddicker's gang in the original RoboCop (1987). White, black, Asian and Latin.
In The Empire, clearly based on Those Wacky Nazis, white human men were the preferred members (ESPECIALLY if they sported sideburns). However, in the Expanded Universe, villains like the Sith come in all colors, genders, and species. Emperor Palpatine himself couldn't care less (considering everyone to be equally inferior to him personally), but encouraged the prejudice anyway to help maintain his power since humans are the majority of the Empire's population and the Core Worlds elite tend to be human males who actually are extremely prejudiced. Thus, the Empire officially was pretty much human males only, with women and aliens being at best shuffled off to insignificant roles, but Palpatine would make (almost always secret) exceptions for women and aliens whose skills were particularly useful to him.
The Confederacy of Independent Systems in the prequels seems to be this combined with Cosmopolitan Council. Every member race/organization is a non-human, with Count Dooku being the only human in the organization. They employ Droids, Geonosians (the flying insect aliens), cyborgs (Grievous), fallen non-human Jedi (Asaaj Ventress), and mutant alien caveman cyborgs. This could be taken as impetus for the Empire to be as discriminatory as it wanted to be, if they fostered backlash in the media. (The novelization for Revenge of the Sith makes it clear that fostering backlash and animosity against non-humans was indeed part of Count Dooku's plans, after he would conveniently switch sides after being captured by Anakin - not that that worked out for him in the end. Palpatine, being the ultimate pragmatist, couldn't care less.)
Jabba's Palace in Return of the Jedi had all kinds of aliens: a Hutt, two Twi'leks (one of them female), Humans (of all races), Rodians, Gamorreans, Weequays, Klatooinians, Niktos, Jawas, even DROIDS, etc as the villains. Plus a cackling lizardmonkey.
In the 2008 Iron Man 1 film the villainous terrorist group operating in Afghanistan, the Ten Rings, is specifically described as having members speaking a variety of languages from all over Central Asia, plus Russian and Hungarian. Astute fans of the comic book might not have been surprised if an East Asian showed his face, too... (As the leader of the group, naturally.) Which is a case of Truth in Television apparently. Many of the paramilitary and terrorist groups are open to and include considerable numbers of Europeans and North Africans.
The gang from the horror movie While She Was Out consists of a white guy, a black guy, a Puerto Rican and an Asian.
The crew of the Black Pearl (both Barbossa's lot and Jack's lot) in Pirates of the Caribbean include white, African, and what appear to be Indian members—Annamaria in the first film is a black woman, and while Gibbs makes much of her gender nobody bats an eye at her skin color.
And in At World's End we see pirates literally from all over the world, with the Brethren Court encompassing many races, cultures and at least two genders.
Lampshaded in The Big Hit: Hitman Melvin (white Mark Wahlberg) is suspected of betraying his employer (black Avery Brooks), who sends Cisco (mixed-race Lou Diamond Phillips) and two gunmen (one black, one East Asian) to confront him at his house. The four have a tense standoff sitting at Melvin's kitchen table, when his girlfriend's drunk father (Elliot Gould), walks in and remarks how happy he is to see four young men of different races sitting together in friendship, in contrast to his wife's rejection of Melvin as a future son-in-law for not being Jewish.
The gangs in The Warriors are generally racially segregated except for the Warriors themselves and the Turnbull AC's who, oddly enough, are a gang of skinheads.
In the original Assault on Precinct 13 (1976), the gang attacking the eponymous station isn't united by race or much of anything really. The police officers even mention how weird it is. It fits though, they have no dialog and almost seem like a supernatural force.
Averted with the all-black street gang Chance encounters in Being There.
In the Bruce Lee film Way of the Dragon (aka Return of the Dragon), Bruce goes to Rome to help a Chinese restaurant threatened with extortion by the local gansters. The crime boss has an effete, Chinese lackey and thugs that are both white and black("I'd like some Chinese spare ribs!") who scare away the customers and beat up the staff. After Bruce deals with these guys, the crime boss flies in an American (Chuck Norris) to kill Bruce.
The criminal gangs in the various Crow movies were pretty ethnically diverse. Even the brother/sister team in the first film were of different ethnicities (they were half-siblings).
In Die Hard besides Hans Gruber and his mostly blonde, Eurotrash henchmen, his gang of terrorist/thieves also included a nerdy black computer hacker, an Asian guy with a Fu Manchu mustache, and an American who looked a lot like Huey Lewis.
Die Hard with a Vengeance. While the film's villain, Simon Gruber, doesn't quite fit this trope in terms of his mooks (they're all Germans and Slavs, with a token Hungarian as second-in-command), John McClane uses this description to convince Zeus to help him. McClane lies and tells Zeus that Simon put a bomb in Harlem (he actually put it in Chinatown), saying, "This guy doesn't care about skin color even if you do.".
In Kick-Ass, Frank D'Amico's organization is comprised out of Italians, Hispanics, blacks and whites.
The members of the Brotherhood of Mutants in X-Men: The Last Stand are very diverse. Psylocke and Quill are Asian, Arclight is Hispanic, Spike is black, and that's not even counting all the nameless Mooks.
In X-Men: First Class, Sebastian Shaw's Hellfire Club apears multiethnic but look again and you'll see only one category; mutants. Shaw saves his racism for Muggles.
Loki's henchmen in The Avengers seem fairly diverse racially. Where they're from is never specified though; Hawkeye just refers to them as enemies of S.H.I.E.L.D.
Captain America: The Winter Soldier (and Agents of S.H.I.E.L.D.) reveals that while HYDRA, as an offshoot of Nazi Germany and being mostly (or entirely) composed of Germans was therefore pretty much all white back during World War II, these days obviously doesn't care about the ethnic or racial origins of its members. This likely reflects the position of its founder, Johann "the Red Skull" Schmidt, who was clearly dismissive of Hitler's beliefs (not to mention of Hitler).
Played with in Dick Tracy, at least out-of-universe. While Big Boy Caprice's alliance of gangsters is almost totally monochromatic, he does include the ape-like Influence (played by Puerto Rican actor Henry Silva) and makes him the fourth-ranked member of the entire gang. (Caprice also has the female gangster Texie Garcia working for him, but she makes only a token appearance; otherwise, Caprice is very contemptuous of women.) Meanwhile, the only non-white "good guy" seen in the entire film is a Chinese shop owner whom Tracy saves from Ribs Mocca.
Evil Overlord Sauron's empire in The Lord of the Rings had armies of Orcs, Trolls, Uruk-Hai, Easterlings, Southrons, Haradrim, Corsairs and Wild Men. Plus we are told that he even had even more allies and trade relations beyond that. The Good Guys (outside of the heroes) consisted of the light-skinned Men of Gondor and Men of Rohan, the Elves, the ents, the dwarves, and allied nations of Men. Despite what some critics have said, some of these allied nations' folk are explicitly described as darker-skinned than the folk of Gondor. Tolkien recognized the Unfortunate Implications of having all the black and swarthy men on the evil side (in The Silmarillion some fight on either side) and suggested in Unfinished Tales that the other two Wizards of the Order were at work in the distant South and East helping good folk of those races resist Sauron's domination.
The Turner Diaries has, as its villains, the System, a group that espouses multiculturalism and consists of every non-white group in the country (led by the Jews). The book ends with The Order, a gang of white supremacists led by the eponymous Turner, overthrowing the System and committing genocide against all non-whites and "race traitors" in the country (and later, the world). Mind you, these are the good guys. The writer was William Luther Pierce, the former head of the white supremacist National Alliance, and it also inspired a number of white supremacist gangs and terrorist groups, including one that took its name (the Order) from that of the group in the book.
In Day Watch, there are a group of dark wizards, called the Regin brothers, who belong to the family chronicled in Norse Mythology and Wagner's Ring Cycle. While the family is of Scandinavian descent, the brothers themselves were all children adopted from poverty in various countries, and who had magical talent. So, you get black, South American, etc. vikings.
In the Ripliad series, Tom Ripley, the Villain Protagonist, is a textbook sociopath who for all his affability manages to destroy a number of peoples' lives. In between his villainy, he likes to go to a "workingman's bar" in the French village in which he lives. Two of the frequent customers are a far leftist and rightist who don't agree on anything except their hatred of non-white immigrants. Tom finds this racism highly offensive.
"In principle, membership of these three groups is not hereditary. The child of Inner Party parents is in theory not born into the Inner Party. Admission to either branch of the Party is by examination, taken at the age of sixteen. Nor is there any racial discrimination, or any marked domination of one province by another. Jews, Negroes, South Americans of pure Indian blood are to be found in the highest ranks of the Party, and the administrators of any area are always drawn from the inhabitants of that area."
Harry Potter: Voldemort's dark wizards don't completely fit this trope, as the series places great emphasis on their prejudices against Muggle borns, but they are certainly more equal opportunity than the Ministry of Magic and the good wizards, as they are much more willing to work with giants, centaurs, and werewolves and are willing to allow the Dementors to have jobs other than prison guards.
In Everworld, the Amazons (much like the Vikings) are portrayed as being largely multi-ethnic, since they mate with whatever men they happen to conquer. Their egalitarianism is limited to women, of course.
In Warrior Cats, the Dark Forest is made up of cats from all four Clans, which are treated like races in the series.
In A Song of Ice and Fire, the Brave Companions (aka the Bloody Mummers) of Vargo Hoat include killers from all over the world, united against the overwhelmingly white armies of Westeros.
In Jon Land's The Council Of Ten, the Big Bad plans to hold a meeting with the leaders of the ten strongest terrorist organizations in the world, and convince them that while they may make noise about advancing their religious or ethnic or ideological groups, what they're really after is simply power; and that if they all unite under him, they'll be strong enough to take it. The heroes crash the conference before anything can be decided.
The Copper doesn't think much of the hominid races (to be fair, he has pretty good reasons), but that doesn't stop him from employing any and all of them as servants, even going so far as ending a long-standing feud with the demen by getting them to agree to serve as the Dragon Empire's Elite Mooks. And he'll even employ creatures considered vermin (such as bats and rats), since he finds them useful.
Live Action TV
Since 24 focuses on matters of terrorism, a rather sensitive topic these days, the producers are wary of staying on any particular race or nationality of villain for too long. Sure, Islamic Arabs have come up in more than one season, but usually not two seasons in a row, and usually it is revealed about halfway into the season that they're actually just Mooks in a larger plan. The larger plan will be headed either by a whiter nation or some rogue Americans—something that itself has been criticized ("Look, if you're going to portray Arab Muslims as the enemy, do you have to make them subordinate to some white guy?"). At the very least, there are always a few Americans in the villain's employ. Also, expect a balancing Aesop to even things out when the producers feel guilty about who the villain is.
The Goa'uld of Stargate SG-1 generally pose as Egyptian Gods, and while there are a number of dark-skinned hosts and Jaffa, they also have lighter-skinned races and cultures, including Goa'uld posing as Chinese and Greek gods. Which makes perfect sense for the Goa'uld - they grab host bodies from whatever's around but their identity doesn't change. After all, we 'all look alike to them'.
Blakes Seven regularly featured women in high-ranking roles in the evil Federation, most notably Supreme Commander Servalan.
The gang that forms out of the Level 5 escapees on Heroes.
In Charmed, the SecondSource of All Evil has a pretty diverse group of underlings. Pretty much the only bad guys he didn't accept in his group were vampires and harpies; he originally let the harpies into his group, but then one of them tried to kill his wife. After that, he cut them out (and cut off their leader's hand). The vampires, however, had a queen who refused to serve him.
Space Cops is set on a planet with 3 species: humans, blues and crocs. Both cops and criminals were equal opportunity employers and to emphasize the point, each week, the criminal gang was led by a committee of 3, one of each species. One episode, the Crime of the Week was racism, so TPTB had to invent a 4th species of Space Jews for the criminals to be racist at. The worst thing is that the 4th species never appeared in any subsequent episodes. Therefore, the cops defeated ONE gang of Those Wacky Nazis, but ultimately, the Space Nazis won.
The shadowy gangster known as The Greek in the second season of The Wire employs the Greek Vondas, the Ukrainian Sergei, and the Israeli Etan, among others, and he deals with the Polish-American Frank Sobotka and the African-American drug kingpin Prop Joe. And in the end, he wasn't even Greek.
Boardwalk Empire places some emphasis on the willingness of gangsters at the time to work with different racial and ethnic groups. Nucky Thompson is an Irish Catholic politician/gangster and he walks a fine line between appeasing the racist [WASP] political elite and supporting the working class blacks whose votes he needs to win elections. On the criminal front his organization mostly consist of crooked Irish cops and politicians but he is closely allied with Chalky White's black gang. In Chicago he has strong contacts among the Italian gangsters and in New York he has an uneasy relationship with the Jewish Arnold Rothstein. Rothstein's primary mooks are the Italian Lucky Luciano and the Jewish Mayer Lansky who are best of friends and just like their mentor have no hangups about doing business with other ethnicities.
Farscape: While your mileage may vary on how evil the Peacekeepers are as a whole, they are often the bad guys and they are quite diverse. Mixed gender battle groups, plenty of female officers, a rainbow of colors...pretty much the only thing they don't allow are non-Sebaceans (Scorpius is VERY special.)
Zig-Zagged in Criminal Minds, the vast majority of UnSubs are white males, much like Real Life serial killers who are overwhelmingly part of that demographic, but there have been a decent number of female UnSubs and a handful of minority UnSubs.
This is a big part of what makes the titular gang in Sons of Anarchythe easiest biker gang in the show to actually like. They commit some undeniably heinous crimes over the course of the series, but they're also the most diverse gang in Charming. In contrast to the all-Latino Mayans, the all-Black Niners and the White Supremacist Nords, the Sons freely accept a Jewish member (Bobby) and a Latino member ("Juice") into their upper ranks, and the earliest episodes have them cooperating with Black sheriff Vic Trammell.
The Michael Jackson videos "Beat It" and "Bad" both have multi-ethnic streetgangs on the verge of fighting each other before going into heavily choreographed dance numbers instead.
Also applies to the Weird Al Yankovic parodies of each video.
Chaos accepts/corrupts everyone, regardless of gender, race, age, ability, social standing, or species (though the main species other than humans are conveniently resistant or immune); as long as you can prove yourself to the Dark Gods, magnificent and terrible power is yours for the taking. It's part of the reason so many willingly defect from the Imperium, as at least Chaos gives you a chance of improving your lot in life.
Stock incompetent villains of Forgotten Realms, Zhentarim. They're bad, sometimes mad, used to serve a God Of Evil Overlords and ended up with a pair of even worse ones. But their armies and poisoned knives work for a simple strategical purpose: power to control the trade. As such, The Black Network is understanding as to the strange tastes of its subsidiaries, but when things like hostility to nonhumans threaten the trade, Zhent high-ups remind the locals their style is about "An Offer You Can't Refuse", not "A Strongly Worded Letter". For that matter, an elf Ashemmi is one of their top-ranked wizards and Sememmon's consort.
Xanathar's Thieves' Guild (actually, more slavers than thieves): here◊ you can see their high-ups including beholder (or rather Elder Orb) boss, a dwarf and a half-drow, the rest of the bunch are humans. Not depicted: doppleganger (or is it?), half-orc, gargoyle.
The humanoid tribes from Mystara's Broken Lands, though each is numerically dominated by a specific majority race, often include substantial minorities of other D&D humanoids.
A somewhat tongue-in-cheek editorial in an old issue of Dragon magazine pointed this out as a benefit of having devils and demons in D&D: they make great villainous equal-opportunity employers because they honestly couldn't care less what their "native" agents on the Prime Material Plane look like as long as they serve their purpose.
The Five Nations of Eberron are rather integrated, at least among the common humanoid races, so several villainous groups (such as the Emerald Claw or some Dragon Below cults) have a nicely varied make-up as well. The Inspired rulers of Riedra are also fairly unbiased in their general oppression, settling for mere dictatorial tyranny over anyone who bows down to them and cold extermination for anyone who doesn't.
Some of the street gangs in Shadowrun accept a diverse mix of ethnicities and/or metatypes, often because they're united by their Hats rather than their backgrounds (e.g. all-decker gangs).
In Werewolf: The Apocalypse, the Wyrm isn't choosy about those he recruits into his ranks. Corrupted shapeshifters, spirits, and humans of all backgrounds are welcome.
The evil shinobi of Senran Kagura will take anybody who pays the entrance fee while the good shinobi only accept those who are already training to be ninja. Of course, this means the evil shinobi get the drop-outs, losers, psychos and people who wandered in off the street, so they have to compensate with Training from Hell.
Many of the evil organisations in World of Warcraft, to the point that the racist organisations like the Scarlet Crusade or the Grimtotem are the exception. Criminal organisations such as the Defias Brotherhood, the Venture Co. or the Bloodsail pirates employ members from the Alliance (mostly humans) and the Horde (orcs, undeads...) as well as non-aligned races (ogres, gnolls) as mercenaries, while cults like the Shadow Council, the Cult of the Damned, the Wyrmcult or the Twilight's Hammer accept anybody fanatic/hungry for power/nihilist or stupid enough to join them. This can lead to some Fridge Logic when overwhelmingly good races like the Draenei show up as members of the Twilight's Hammer.
Evil Genius takes this into an interesting combination. Henchmen can indeed be picked from anywhere in the world, but the limited number of models means that minions all look identical. However, clicking and zooming on a minion gives a mini biography, and shows that each has a different name and last name, many are Anglo-Saxon, Latin, and Asian. Clearly, the Evil Genius may be a heartless power seeker, willing to execute minions at the drop of a hat, but (s)he values diversity, or at least regards everyone else with equal contempt. Lampshaded in-game, where a couple of the Acts of Infamy point out that the Evil Organization is equal-opportunity, and thus will spread pain and misery in equal amounts to everyone. One mission involves burning down a national park, if only because "we've been focusing on urban mayhem lately."
The Nazis in Bloodrayne are surprisingly diverse for, well, Nazis. Their leadership includes among their ranks two women (one of whom is Asian), a pair of disabled people, a freakish 10-foot-tall cyborg, and an 80-year old man.
Once, the City of Heroes developers held a poll as to whether they should add more gender equality to enemy groups, or simply add more, different enemy groups to the game. The latter won out in the end, and most players think the groups have enough gender and racial diversity to fit them thematically- while street gangs and Mafia and Yakuza-ish syndicates tend to be boys-only clubs in Real Life (with a few exceptions), the Crey Corporation is as politically correct as you'd expect an Evil Corporation to be (and the Corrupt Corporate Executive running the whole show is female), the Arachnos army has plenty of men and women on the front lines, and the heroic paramilitary Longbow corps and Vanguard are both run by women and staffed by many. And as of a recent issue, even Ancient Romans have female soldiers in the ranks.
Metal Gear: Throughout. The very first Quirky Miniboss Squad contained two Russians, a Brit, a German, an Inuit, and an American, and from then on teams get even weirder. In context, probably Dead Cell are the strangest, with an openly bisexual Romanian and a black woman as the two team leaders in what was originally a SEALs unit.
The 3rd Street Saints in the eponymous Saints Row series, from Saints Row 2 you'll find members of any race and gender wearing purple. The enemy gangs include all genders but are orientated towards one particular race to suit their theme (Brotherhood - White, The Ronin - Asian, The Sons of Samedi- Hispanic). Then in the sequel you have the all-male Luchadores, the Deckers who have male cannon fodder and female Specialists and the Morningstar who have all gender members. The Saints once again welcome anyone with a taste for mayhem and violence and you're free to customize the gang's members anyway you wish. Thanks to the myriad of customization options in Saints Row: The Third, you could have a gang made up entirely of fursuiters. The Saints don't judge.
Villains in the Super Mario Bros. series are known to contain a variety of different evil minions. The most famous being of course, Bowser, whose Mooks include giant mushrooms, giant turtles, evil man-eating plants, squids of varying sizes, evil fish, ghosts, and some games have enemies unique to them.
In Castlevania, Dracula's evil army contains the undead, classic horror monsters, virtually every mythological monster you can think of, and various other enemies that all fit into other categories. Oh, and Death, of course.
The Warlock/Dungeon town in Heroes of Might and Magic contains a wide variety of creatures of the course of the series, which include harpies, minotaurs, centaurs, hydras, hot dark elves, and their signature unit, dragons. The Barbarians of I and II were also somewhat free in their hiring, featuring goblins, orcs, trolls, ogres, cyclopes and wolves (and a large number of human heroes) - all traditional horde-related creatures, but better than just undead. III removed the barbarians/Stronghold from the evil camp, and the new Inferno town wasn't quite so inclusivenote But more inclusive than it might seem at first glance, the RPG series revealing that efreet, gogs and imps (and probably hellhounds, as well) were not invading aliens that arrived in a Night of Shooting Stars.
In Dragon Age: Origins, Arl Howe's servants include qunari mercenaries, elves and even mages. The latter two are both heavily discriminated against in the setting. In fact, Howe doesn't seem to care who he employs, so long as they're … morally flexible. (As one city guard says, Howe's men are "worse than the criminals we arrest. Some of them ARE the criminals we arrest.") He doesn't actually think any higher of elves than the average human in the setting, dismissing them as "animals" if the City Elf Warden confronts him with what he had done to the Alienage.
Assassin's Creed plays this seemingly straight for the 11th century Templars, featuring both Arabs and European Crusaders in their ranks. However, it's downplayed in the spinoff sequel Bloodlines, where former high-ranking Templar Maria has now lost her status and is pretty much hunted, since she no longer has Robert de Sable to keep her in despite the No Women Allowed rule.
No More Heroes and its sequel feature very diverse enemies in terms of ethnicity, lifestyle, etc. In between the two, they included an old Soviet Cosmonaut, a black girl with a Japanese name, a straight-up Japanese man, an English schoolgirl, an all-American quarterback, a character actor, a Polish magician, a German punk-rock star, a black Irish cult leader, and an amputee/fashion model/marine, just to name a few.
Goblins in Dwarf Fortress frequently kidnap children of other races, and raise them as productive goblin citizens who advance normally in goblin society and abide by goblin societal norms. This can reach such an extreme as to circle into inversion, in which none of the members of a goblin community are goblin by blood, and may be homogeneously elves, humans or even dwarves. The only exception is one aversion; only full blooded goblins seem to become priests, and they may be the only racial goblins present at a nominally goblin settlement.
In Deus Ex: Human Revolution, despite being based in a Chinese city and explicitly being under the control of a Triad leader, the Harvester street gang has a large amount of American accented Scary Black Men (who ironically call Jensen "gwailo" or "laowai", Chinese racist terms for "foreigner"). Also, the five main bad guys you face are composed of an Afro-Russian, a Southern-American, an Israeli super-soldier, a Chinese business woman and a knighted Englishman. Evil comes in many flavors.
In Sword of the Stars II, a single pirate encounter can see you facing craft from all the different racial factions.
The Dark Brotherhood in The Elder Scrolls V: Skyrim is the second most racially-diverse faction in the game (first is the College at Winterhold).. Among their ranks are a werewolf, a lizard man (argonian), a dark elf, a vampiric child, an elderly (Imperial) man, a Redguard (black guy), and the leader is a presumably-30-something Nord (white) woman. The Dragonborn (PC) can choose to be any race and will still be accepted in their ranks (although this is true for every faction in the game). And, of course, the Brotherhood is basically an assassin cult.
The Thalmor and the Forsworn, while genocidally racist, appear to have pretty liberal views on gender. The Thalmor ambassador to Skyrim is a woman, and you'll encounter plenty of female Thalmor soldiers and wizards in the wild. The Forsworn also have female warriors and mages that are no less murderous than their male allies.
In Mortal Kombat 9, the Lin Kuei seem to be this; they ally with Shao Khan and the prominent Lin Kuei we see are from various backgrounds, such as Sektor (Chinese), Cyrax (Botswanan), Bi-Han (original Sub-Zero/Noob Saibot) and Kwai Liang (second Sub-Zero) (both Chinese-American), and Smoke (Czech).
In Guild Wars 2, while many of the villainous groups are racially-exclusive (and in the case of the Flame Legion and the Sons of Svanir, only accept men), both the regular seafaring pirates and the Aetherblades) are very diverse, much like pirate crews in real life.
In Shin Megami Tensei, while YHVH is a Knight TemplarMad God, he is utterly consumed by his desire for egalitarianism. His subordinates, not really understanding his will, have occasionally fostered the birth of several highly classist societies. The moment He sees what's going on, all of that is immediately thrown out of the window en lieu of an effort to make everyone equal.
V.I.L.E. has boasted villains of all ages, genders, nationalities, and even a couple who weren't human- and of course, their leader is a Hispanic woman herself.
In this page of Cwen's Quest the villains make it clear they do judge anyone in a speech to rally the team members to slaughter a village down the last child.
The Slavers in Lightbringer seem to be predominantly Caucasian, but Lightbringer notes that its members come from all sorts of different races. This probably has to do with how they began as a group of unrelated gangs.
Last Res0rt has the furry variant of this trope: the Star Org isn't just made up of several different species, it also contains several alien species that aren't seen anywhere else. Enforced by a cameo drive (to raise funds for the first book) where fans submitted their fursonas (most of which were not of a species already featured in the story) to sign up and be featured as mooks and officers in the Star Org.
Team Evil from The Order of the Stick is surprisingly inclusive. It is willing to employ or work with goblins, hobgoblins, ogres, ghasts, zombies, chimeras, mind flayers, humans, succubi, drow elves, kobolds, dwarves, half-orcs, and others. Ironically enough, Xykon is much more tolerant than Redcloak, who dislikes humans and hobgoblins. He got over the latter.
The Veslian armies from Dark Wings will hire anyone or anything that can kill Veslin's enemies.
The trolls in Homestuck seem to be pretty thoroughly egalitarian when it comes to gender: they're just terribly strict about the roles and rights of different blood castes. This trope is pretty well justified when it comes to sex: trolls are born in hatcheries en masse, with no knowledge of their genetic parentage, and any romantic coupling (male/female, female/female, male/male) is equally viable for breeding. Since biological gender became completely irrelevant to them ages ago, it makes sense that they don't feel the need to split up their galaxy-conquering firepower with sexism. Officially, anyway; according to Porrim Maryam, the fact that the trolls are ruled by an empress does not make the lower blood ranks less patriarchal.
Although Sturgeons Law is trying to take over or destroy the world, the company's workforce is quite diverse in race and gender.
Although the USA of Decades of Darkness are an ever-expanding, slaveholding empire that makes peons of most Mexicans and other Latin Americans, some Hispanics from rich families manage to rise to the top — Alvar O'Brien (Álvaro Obregón) even becomes president as early as 1932.
The Evil Overlord List specifically recommends being this; recruiting people of both genders and all races into your Legions of Terror, allowing handicapped people to work for you to prevent a few common mistakes, and spreading oppression and terror equally amongst all your subjects, and not singling out a specific group who will form the core of a rebellion.
Dragonstorm, the enemy organization of SF furry role play Darwin's Soldiers, has shown in its ranks examples of almost every species yet introduced. Of course, so does every other faction; cross-species racism is almost never touched upon.
"That's the most culturally diverse gang I've ever seen!"
This is noted as one of the ironies of The Elfslayer Chronicles. Despite being portrayed as sparkly homophilic environmentalists, the Elves of the aforementioned Chronicles are pretty racially exclusive, while the greedy homophobic human empire has dwarves, half-orcs, tieflings, and (presumably) full orcs as fully accepted members of society.
In Avatar The Last Airbender, among the series four Elemental Nations, Evil Empire the Fire Nation has integrated women into their armed forces (though only in the homeland, not the occupying army), none of them question being ordered around by a teenage girl, and even their prisons are unisex. Contrast this with the Northern Water Tribe, which didn't even allow women to learn combative Waterbending until Southern Tribemember Katara forced the issue, and the Earth Kingdom, which doesn't have any women in positions of power. And though the typical Fire Nation policy and attitude towards other nations is essentially racist, Princess Azula is quite willing to employ the Dai Li (the EarthbenderSecret Police of Ba Sing Se, whose ruthlessness she admires), and even returns to the homeland with a personal contingent of them.
Sequel SeriesThe Legend of Korra has the titular Avatar visit multicultural Republic City, where criminal gangs are common. While some seem to be racially exclusive, the Triple Threat Triads each consist of a Firebender, Waterbender and Earthbender. (Compare the police force, which seems to be entirely Earthbenders.)
Amon seems to accept people of any background, so long as they aren't benders. Subverted when he attacks the Pro Bending arena and, among other things, has his followers electrocute the non-bending announcer.
Parodied in the Family Guy episode "Excellence In Broadcasting" with Brian being attacked by a racially diverse Theme Park Version of a criminal gang.
Cobra in G.I. Joe is made up of people from all corners of the world, with Cobra Commander himself being one of the only white American males. In the original Marvel/Sunbow cartoons, at least, Cobra is predominantly filled with Caucasian males; women are notably absent from the rank-and-file Cobra Vipers, and the partially-exposed face masks they wear make the absence of dark skin obvious. There are a few noticeable (and generally uncommented on, curiously enough) exceptions with Cobra troopers—most prominently in the episode "Spell of the Siren," with Cobra and the Joes forming ad hoc Amazon Brigades of their female unnamed low-ranking troops after most of the men are zombified.