Dorian Red Gloria demonstrates: never trust the fey ones.
These male characters are badass nancy boys. They're often campy, vain and in many cases pretty, but they're also incredibly effective at what they do, and quite powerful. They may have combat skills, seduction ability that rivals James Bond's, or simply be Chessmasters skilled in manipulating others. They can be gay or straight, good or evil, played for laughs or played seriously, but they're all dominant personalities who tend to get their way. They also tend to be romantically successful, attracting admirers, and often getting the girl (or boy, as the case may be).
Unlike real men wear pink these characters are not macho with one or two girly interests, they're all around girly characters, who are also tougher, cooler, and more surrounded by ladies than any normal person could ever hope to be (to some extent because they're girly). These characters are rarely regimented military types, usually filling more the loveable (or in some cases detestable) rogue type, though occasionally one is seen in the role of military leader of some sort. Decadence is also a big part of this trope, as they're usually more FABULOUS than simply "feminine".
Some ways in which girly-ness can make a character more badass:
In some cases effeminacy is a tactic for these characters, a way to unsettle and intimidate their enemies, by the logic that "if he can still be badass and confident in his masculinity in that dress, his balls must be the size of watermelons and made of steel." They're still inherently effeminate characters, but they've realized that it throws people, and so use it to their advantage.
It can also be seen as a sexual tactic, as in some universes acting girly seems to attract women (and in certain shows everyone else) in droves. This is possibly a case of truth in television as women seem to have an easier time trusting girly men, and thus girly men often use this as a tactic to get laid.
On a related note some characters use their femininity to maintain an element of surprise. (E.g., "No one suspects the flamingly camp hairdresser of being a super soldier")
Sometimes girly knowledge is also a part of the badassitude. (E.g., "Mrs. Busby did it because her shade of lipstick was on the napkin that was found with the victim, it's called passion plum, I very nearly borrowed it for the ball the other day")
Leeron from Tengen Toppa Gurren Lagann, full stop. He's basically every Camp Gay mannerism personified, but he's also capable of being able to creep out the manliest badasses in the show (both Kamina and Viral especially). He also happens to be the most awesome engineer in the multiverse, and all the crap he makes or takes command of does totally awesome shit that makes reality and probability his collective bitch. Being voiced by Steve Blum, whose Camp Gay is surprisingly good, doesn't hurt either.
The androgynous and beautiful angel Rosiel from Angel Sanctuary serves as the series' Big Bad. The extent of his powers cause even some of the lesser villains to fear and/or respect him.
Dorian: From From Eroica with Love, it's almost impossible imagine anyone more camp than Dorian... and yet he's a world renowned art thief and keeps avoiding capture by...everyone.
Yuujirou: From Princess Princess seems to be the toughest (or at least the most macho) of the bunch, but he has long pretty hair, and seems to be the one most dedicated to being a Princess for the sake of being a Princess.
Lelouch from Code Geass. When he's not fiercely commanding his troops on the field of battle, he's often seen comforting his little sister and sometimes hanging out with the girls at school. In addition, he cooks, and, when in Secret Identity mode, is absolutely fabulous.
Kuranosuke from Kuragehime sort of qualifies. He saves the jellyfish for Tsukimi and other awesome stuff.
Nathan Mahler of Blood+ seems to use his flamboyant qualities to conceal some of the darker elements of his personality.
Mephisto Pheles from Blue Exorcist wears a pink and purple outfit, rides around in a pink limousine, carries a pink cell phone with little charms of cute animals, and has a pink parasol he brings everywhere. This is the same man who can restrain two berserk sons of Satan in seconds without much effort (note that one of them caused an earthquake earlier just from casually punching the ground while the other accidentally burns an entire forest using his Battle Aura). It's not like anyone dares to make fun of his taste in clothing. However, he seriously sucks at cooking. Just ask Yukio and Rin when their dorm's chef is away.
Also, Mr. 2 Bon Kurei, an earlier awesome transvestite who uses the same transvestite martial arts Ivankov is a master of.
Cavendish, who is drawn in your typical Bishounen style and violently furious with the Supernovas for taking away his then-growing frame. But when he was able to stop a 500,000,000 berry pirate's headbutt attack with nothing but his sword, you know he earned his status as a New World Pirate.
Cain from Nightwalker is fairly flamboyant and tough as nails.
Count D from Pet Shop of Horrors qualifies. He's girly and loves sweets... and is technically responsible for many many deaths.
Bleach introduces us to Shunsui Kyoraku, who wears a pink flowery woman's kimono, likes making grand entrances surrounded by falling petals, and hates fighting. According to the Bleach Character Book of Souls, he's well-known as being Soul Society's biggest dandy. He's also a Combat Pragmatist who is fond of attacking people mid-speech whilst making pithy comments of his own, and does so with a look of something like Dissonant Serenity.
Szayel AporroGranz, who will stop a fight just so he can change into a less torn set of clothing and whose entire theme is full of sexual innuendo. As an Espada, he's also a leader of Hollows, although he tends to cultivate followers solely to eat them when he needs to power up.
Sunny from Toriko. He even prepares food that makes anyone that eats it become Bishōnen (by killing creatures that would take entire armies of "normal" people for incredigents). His effeminancy and aloofness are contrasted with his Tomboyish, Genki Girl younger sister .
Ukyo of Samurai Seven initially seems like a simpering, brainless fop, which he actually is, minus the brainless part. The real Ukyo is a Magnificent Bastard who is like The Prince distilled into a person. While he has little to no combat skill himself, he's good enough at manipulating those who do that he doesn't really need it.
Zarbon from Dragon Ball Z is a great example of the military version of this, being Frieza's highest ranked general and right-hand man.
Saint Seiya: Lizard Misty, the Leader of the Silver Saints. Also,Pisces Aphrodite.
Kurama from Yu Yu Hakusho. Long, flowing red hair, a rose motif, his main weapon being a whip, and little visible muscle add up to a fairly camp-looking guy, but one who is not to be underestimated. Being a master of demonic plants has it's advantages; just counting the people Kurama has hacked to pieces with his rose whip would be a good start, but by no means is it the full list of lives he's taken demons and humans alike. The resident Blood Knight even considers him the deadliest one of the team.
Karura-oh Reiga. Flamboyant, flirty, a total tease towards Shurato, VERY feminine-loking (lipstick included), fond of giving beauty tips to Lakshu... master strategist, skilled warrior, with enciclopedic knowledge about geography and lore that comes off very handy in the quests for the group.
Eduardo Flamingo, who debuted in Grant Morrison's run with Batman. The Flamingo is a psychotic hitman. He was lobotomized by the mob and was recruited by them. Despite his name, as well as his pink uniform and vehicles, he is a sociopathic, mindless, killing machine, nicknamed "the eater of faces", a title he has lived up to. He appears as an enemy of Damian Wayne in the future. His appearance is heavily inspired by the cover artwork for the Prince album Purple Rain.
Marvel Comics remake of The Rawhide Kid was supposed to be this. An effeminate, Ambiguously GayCowboy who was still a crack shot with any gun and a total Badass. It's arguable whether or not they succeeded...
To some extent Captain Jack Sparrow of Pirates of the Caribbean is one of these, with the eyeliner and all the dangly things in his hair and his rather effete and flamboyant mannerisms. Johnny Depp has stated in interviews that he intends Captain Jack to read as bisexual.
Lord Shen from Kung Fu Panda 2. Despite actually being a peacock, his skills with steel claws and razor feathers makes him impressive to watch.
Guy Bennett in Another Country. Nobody else has ever looked this badass in extremely effeminate dark sunglasses. And when he gets attacked by jocks he simply threatens to expose their numerous earlier homosexual experiences with him. Ka-Pow!
The Boondock Saints: When the Boston cops first notice Agent Paul Smecker's flirtatious behavior towards men and generally camp hand gestures, they start to laugh. Cue Smecker owning their asses for the rest of the movie. In fact, he gets progressively more camp and progressively more awesome, coming to the point where he dresses up as a female hooker to infiltrate the big bad's mansion. He kills two goons and saves the heroes from their untimely demise.
Duffy: This was their target, the fag man. Smecker: The what man? Duffy: (beat) The fat man. Smecker: Well. Looks like Freud was right.
Ramon de la Vega aka Bunny Wigglesworth, the eponymous Zorro, The Gay Blade, a utter Camp Gay but you don't want to get on the wrong side of his whip.
"Mr. Green" from the movie version of Clue. He's actually an FBI agent who spent the whole movie (plus whatever setup time the sting required) pretending to be gay to get into Mr. Boddy's blackmail ring. He is the one who finally killed Mr. Boddy. In the hallway. With the revolver.
Raoul Silva from the Bond film Skyfall. His mannerisms are really flamboyant, and he's also a total Magnificent Bastard who's generally one step ahead of Bond and MI6.
King Candy in Wreck It Ralph may talk with a lisp, dress in frilly clothing, and use flamboyant word choices and gestures (such as calling people "silly" with a downwards wrist stroke), but he has The Chessmaster levels of cunning and is, by a long shot, the best driver in Sugar Rushuntil Vanellope joins the races. To a lesser extent, Rancis Fluggerbutter, also from Sugar Rush, hangs out with the Alpha Bitch, behaves like one, and wears makeup that runs when he cries, but he is one of the top four racers in the game and also one of its most aggressive.
Zillah: From Poppy Z. Brite's Lost Souls, is a super strong, sadistic vampire who keeps impregnating women... and is continually described as "androgynously beautiful" with "long caramel colored hair" which he ties back with a purple scarf and he seems to enjoy wearing eyeliner and other makeup.
Lestat: From The Vampire Chronicles He's a clothes horse and a huge dandy... but also obviously quite terrifyingly badass.
In George R. R. Martin's A Song of Ice and Fire, Ser Loras Tyrell, the "Knight of Flowers," is repeatedly described as beautiful and effeminate (he looks very similar to his sister Margaery, who is a paragon of female beauty). He is also one of the best knights in the realm and Word Of God confirms he was in a homosexual relationship with Renly.
Howl of Howl's Moving Castle is a pretty prissy narcissist who kicks insane amounts of butt. The narcissism gets better.. however he stays quite a girly boy throughout the series.
Firesong from the Heralds of Valdemar series. He's Camp Gay, very effeminate and the most powerful mage in the world, basically. Also he is literally called a peacock to his face multiple times. Vanyel also counts, though he's slightly less camp, even more powerful, and Firesong's ancestor. Just as pretty, though. And he is also literally called a peacock more than once, having quite an affinity for finery and good grooming.
Vanyel also mentioned a duelist who was straight, but intentionally played camp to annoy his enemies
Jerry Cornelius might qualify— he's been known to dress in drag (and look damn good doing it), and happily seduces people of either sex.
Huillam d'Averc from the Runestaff series could also qualify; as he's an effeminate and foppish French aristocrat, who seems more interested in clothing, womanizing, and his (exaggeratedly hypochondriac) various illnesses. But he's also a renowned swordsman and tactician, and one of the most feared nobles of The Empire prior to his Heel Face Turn; using his effeminate manner and supposed illness to cause his opponents to underestimate him.
Raoul de Beausoleil from Margaret Weiss's Star of The Guardians and Mag Force 7 series certainly fits this description. He's flashy, campy, effeminate and deadly gorgeous in an extaordinarily androgynous way. Quite fitting for an assassin whose favorite weapon is poisoned lip gloss. He reads Camp Gay as he's usually flirting with the guys and being catty toward women concerning their physical appearance. He spends so much time fussing over his hair, makeup, nails and clothes, that it almost falls into the comic relief category - until he does something so awesomely badass that it reminds everyone that he really IS one of the most dangerous men in the galaxy.
Thomas Raith from The Dresden Files is very much a pretty boy, but he's also indisputably bad ass. It helps that he's a vampire, and thus has supernatural speed and strength. To give an idea of how effeminate he is (or rather, how effeminate he looks), for a good portion of the series, he masqueraded as a French Camp Gay hairdresser, and no one saw through the disguise.
Lord Brandoch Daha from E. R. Eddison's The Worm Ouroboros. He is explicitly referred to as "delicate", his looks are described as "like a girl's", and he dresses extravagantly — but he is also one of the best warriors and the best swordsman in the world of Mercury.
Sir Percival Blakeney, Baronet, aka The Scarlet Pimpernel. Dresses to outshine the girls, appears late at balls because he lost his time trying to tie his cravat just right, and generally dismissed as a fop. Has snagged the hottestredhead in Europe as his wife, and all the ladies fawn over him, his Camp posturing, and his slender white hands that are dainty enough to pass as a woman's. Also happens to be the ultra-badass secret vigilante who pulls off daring rescues of French aristocrats on a regular, if not daily, basis. Might even be the Ur Example; also a case of Author Appeal, since he was created by a woman who very obviously wanted to be his wife.
In Julian May's Saga of the Exiles, there's a member of the supporting cast known as Mr Betsy- a transvestite former engineer and Queen Elizabeth the First impersonator (with a goatee). He's also one of the enforcers the Lowlives have to ensure none of them get any ideas about stealing the aircraft they're repairing, quite capable of holding up someone a good ten kilograms heavier than him.
Major Joachim Steuben of Hammers Slammers is one. The words that describes his appearance best is "pretty", and everything about him, from clothes and gun to manicure and haircut is stylish, beautiful and expensive. However, Steuben is a full-blown psychopath, and a pistol marksman to rival Wild Bill Hickok. Everyone in the regiment, except possibly Colonel Hammer, is scared shitless of him.
Magnus Bane, the High Warlock of Brooklyn, from Cassandra Clare's Mortal Instruments series is this. He features glitter eye shadow, rainbow leather pants, and awsum ass-kicking.
Lymond, from the Lymond Chronicles by Dorothy Dunnett has his Peacock moments, including being prettier than all the girls and fatally attractive to everyone he meets, and dressing like an arch-dandy, with exquisite gorgeousness times ten. Subverted in those moments when, in private, he reveals that his real tastes are simple and modest.
Felix in The Doctrine of Labyrinths is this trope to the very core: beautiful, vain, cruel, and shallow, but still an extremely powerful wizard.
Pharaun Mizzrym in the War of the Spider Queen books. Slender and effeminate (by human standards) even for a drow and exceedingly vain about his clothes and hair; at one point in the first book he stops to ask a fallen enemy who did his hair and is extremely disappointed to find he's already expired, and his major complaint when headed into an infernal plane is how long it's been since he's had a bath. He's also one of the best wizards in Menzoberranzan, kicks massive amounts of ass in battle (he favors lightningspells), and ends up sleeping with someone who's supposed to be surveilling him.
Live Action TV
Jason King, in both Department S and Jason King. And how.
Vince Noir is one of these. He consistently ends up saving the day for his more masculine counterpart. He's a superb fisherman, and has many foppish "battle scars" as well as the fact that he's been shown to use a hair straightener as a weapon.
"Nicky Clark, hottest you can get," - Vince (in reference to the hair straightener)
Kyosui Izumi of the Kamen Rider Double world. Flaming mannerisms, loves hitting on men he finds handsome, openly in love with his boss. Happens to be a nigh-unkillable zombie Super Soldier, very handy with a bullwhip, whose favoured tactic is to wrap his limbs around an opponent and crush them like a constrictor snake. When in his monstrous form as the Luna Dopant, he can give the titular Kamen Rider a hard time even when he's not spawning armies of Mooks.
To a lesser extent, Izumi's actor, Genki Sudo; portrays the hilariously effeminate character described above, and happens to be a very capable mixed martial artist in real life.
The producers of Horrible Histories concede that as a general rule, their versions of historical figures tend to "somehow..." end up more camp than the reality, including badass men. Sometimes it's much more overtly played with, as in the course of recasting the greatest flying aces of the Battle of Britain as a boy band, or by having barbarian warriors give fashion advice in Danke magazine.
James May. Yeah, he wears flowery shirts, has long girly-looking hair, loves wine and Bach. However, the show's challenges have demonstrated that he is an immensely skilled mechanic, the best shot with a rifle of the three presenters, and he's pretty handy with the machete. Also, despite jokes and banter to the contrary, he's quite the Badass Driver.
The Greek god Dionysus: He's a hard drinking, effeminate pretty boy... whose cultists tore goats apart for fun and feasted on raw meat. Originally, though, artwork depicted him as bearded and masculine like other gods, so this is only Older Than Feudalism.
Not quite. The robes he is usually shown wearing in Greek Art are women's clothes.
Particularly in Bacchae, where he's seen as the non-supernatural variety of this — a rather femme con man who leads all the women out of the city to have what obviously must be an orgy (why else would women want to leave their homes and spouses?) — before he proves himself to be an androgynously beautiful wizard-god whose devoted followers rend nonbelievers limb from limb in a state of ecstatic frenzy.
Balder from Bayonetta. He is an elderly sage who wears an ornamental gown along with the body of a white peacock draped around his shoulders, its feathers fanned out behind him. He proves himself a badass when, shortly after tossing Luka out of a window and stopping Bayonetta's bullets, he destroys two demons with little to no effort; he even combs his hair with a feather after killing the second one.
About the male Big Bad and Dragon characters (and some protagonists!) from the majority of the post-FFVI Final Fantasy games; while it's mostly a matter of fan interpretation considering how FABULOUS people such as Sephiroth, Kuja, and Seymour happen to be since they're rarely (if ever) referred to as femininely attractive in-universe, Cloud definitely deserves at least an honorable mention. Not only is he able to perform acrobatic maneuvers involving a sword that should logically weigh more than he does, fight off dozens of soldiers in a high-speed motorcycle chase, and use the sword upon which he was at that moment impaled to throw the user of said sword into a bottomless pit, he is also a more convincing female prostitute than both Tifa and Aerith.
According to a letter mailed to Zack, Sephiroth uses up an entire bottle of both shampoo and conditioner whenever he has to wash his hair. For all the crap Sephiroth does throughout the franchise, he does keep his hair pretty spiffy.
Demon Lord Ghirahim from The Legend Of Zelda: Skyward Sword, who is not only pretty darn flamboyant and fancy looking, but is also an utter bastard and is someone you really don't want to cross.
Endrance from .hack//G.U. is verypretty, flamboyant, and deeply in love with the male lead. Said love is what motivates him to perform twoawesomeBig Damn Heroes moments, and he is a very useful party member.
Zhang He in Dynasty Warriors. In one of the games he had a butterfly outfit. Seriously. He always looks, acts and talks overly flamboyantly (like when he persuaded Xiahou Yuan to do a pre-battle dance routine so their ride to victory would start "beautifully")... but those ginormo claws attached to his hand aren't just for show, and he tends to be one of the most frighteningly effective officer killers in the series.
Seliph from Fire Emblem: Genealogy of the Holy War... well, he's got the looks, and adds in the fact that he's surrounded by beautiful women (if you take them all into account, 15 of them are possible Love Interests, a number that sets him apart from other Lords in the series), and then not only he's a level-headed and kind Humble Hero, he also he's a total Badass once he gets out there to fight The Empire— he's got the same caps as the famous Ike, and he grows faster, and has a better weapon to boot.
In the Suikoden Series you have Milich Oppenheimer in the first game and Augustine Nabor in the third. Milich is a high-level mage knight hybrid with good defense and both male and female accesory options, making him versatile and powerful in all areas except luck. And in the original Japanese game his pet songbird/lover Kasios is a male (changed to female for the American release, although the portrait is so androgynous its hard to tell what Kasios is). Augustine has top ranks in parry and swing speed, allowing him to solo a lot of military battles if he's properly equipped and he can go toe-to-toe with Yuber, the game's villainous murder machine. All this and a special attack where he does massive damage to an enemy, who then is showered with rose petals while Augustine poses in a rose-themed frame.
Ash Crimson and Benimaru Nikaido from The King Of Fighters. Both are very, very pretty and vain about their looks, but they also can pack quite the punch in the battlefield.
Despite his rather calm characterization and his almost complete lack of gratuitous Jo Jo poses in the actual manga, for no reason whatsoever Capcom gave Kakyoin some of the most...FABULOUS idle poses which can change when he taunts or attacks in Jojos Bizarre Adventure Heritage For The Future.
Tip Wilkin from Skin Horse is on a team with a genetically engineered battle dog and an unstoppable undead killing machine, and so people forget he's a threat. However, Tip is phenomenally badass. Holds a Captain's commission in the Army, after having received a Bronze Star on an Afghan tour of duty, having dragged several soldiers out of a burning Humvee. On-screen, he's saved the Skin Horse team from a town full of werewolves with an amazing I Call It Vera moment, defeated Moustachio's attempt to detonate a nuclear bomb, out-wrestled a trained former KGB agent, and can take it for granted that almost any woman he meets will be falling all over him within minutes. He is currently employed as a psychologist, and only wears the peak of feminine fashion
Tarvek of Girl Genius is looking more and more like one of these, particularly when his response to the possibility of Agatha's becoming an Evil Queen is to speculate on how well she'd pull off the outfit.
Jyu Viole Grace and Koon Agero Agnis from Tower Of God. One is constantly mistaken for a girl, the other is often mocked for his ear rings. Never the less, they are both respectfully the strongest and smartest amoung the regulars.
Mozenrath from Aladdin is a young, snarky pretty boy of a wizard who tends to greet his foes with a friendly, if not outright flirty tone of voice. He also happens to be one of the most cunning and dangerous enemies Aladdin has ever faced.
Russell Brand: While he may not be physically tough, he is quite the lady killer...and my lord is he camp.
Also Eddie Izzard's coinage "Action Transvestite" probably sums this up quite nicely, though not all examples are true transvestites.
Jonathan Rhys Meyers is quite camp and plays many gay roles, yet is a well-known womanizer. The Cork accent didn't help combat the camp.
Nikki Sixx: when he was young he was a juvenile delinquent who burgled homes, dealt drugs, and beat people up. He also really knows how to rock lipstick...and he's dated a bunch of Playboy bunnies and other famously sexy women. In a crowning moment of awesome chased down and beat up Lars Ulrich (of Metallica) after Lars heckled him during a show...while wearing platform heels.
Le Chevelier D'Eon: In real life, not the anime. "I'm just going to live the rest of my life as a woman so I can continue to be a badass super spy, whatever."
Flamboyantly gay H.H. Munro (Saki) turned down an cushy officer assignment in WWI and died in the line of duty protecting a comrade.
Alexander The Great was pretty fabulous in terms of dress sense, and we all know how badass he was.
Neil "Bunny" Roger, fashion designer and socialite, who was already a famous Camp Gay when he went to fight in World War II. He came back a hero, and his line on the subject was, "Now that I've shot so many Nazis, Daddy will have to buy me a mink coat."
Vikings, believe it or not, had shades of this back in the day. Many of the surrounding cultures thought it was kind of sissy to wash and comb your hair every day, bathe once a week, and wear colourful clothes and blingtastic jewelry. Then these nancy-boys start beating you up, take your stuff, steal your girlfriend and burn what's left...
Similar to the above, it's a good idea not to fight ancient Greek warriors, especially Spartans, if you see them all doing each other's hair before battle. That's because it signifies they're fully intending to kill you or die trying, and want to look their best in case they die.
Prince Rupert of the Rhine, nephew of Charles I and one of the main Royalist commanders of the English Civil War, was a famous fop but was also one of the bravest fighters of the war. Too brave, sometimes.