One of these was a Commodore of the Marines and a Filler Villain in the Dragon Filler Arc of One Piece. So far he's been the only high-ranking Marine officer to not have asskicking skills to back up his rank. And he was constantly shown eating a huge piece of meat after piece of meat.
Alvida described herself as the most beautiful marauder on the ocean, in spite of being roughly spherical and having a terrible attitude. Later on, she returns after having eaten the Slip Slip Fruit, and she's lost so much weight she's not even recognizable as the same character any longer; she goes out of her way to mention that the only difference in her appearance since Luffy last met her is that her acne has cleared up.
In Bambi And Her Pink Gun, King Grabba is a grotesquely fat... rock star with hordes of screaming female fans who carry signs to his concerts that say things like "Rape me." To help you figure him out, he's an evil version of Elvis Presley at the height of his decline, and he savagely beats the women who come to see him backstage, instead of, you know, having sex with them. Oh, and when fans tell them they love him, he responds with "I love me, too!"
Somewhat subverted in Nausicaš of the Valley of the Wind, with the males of the Torumekian royal family. They're all grotesquely fat and initially somewhat villainous, but all of them show themselves capable of goodness near the end of the story, except for the one who got eaten by a giant bug before he had the chance to be redeemed like the others.
Subverted in Paprika The enormously fat Tokita is suggested to be something of a Man Child, as well as a comically ridiculous overeater who gets stuck in narrow passageways. However, he's also brilliant and, unusually enough, gets the girl.
Fist of the North Star had a lot of fat characters, but several truly stand out. The most famous of them is Mr. Heart, who is ten feet tall, and so fat that if you punch him 'your fist gets stuck up to the elbow.' He is famous for being the first villain to present a challenge and actually do damage to the main hero. Then there's Galf, who looks like an evil version of Mr. Weatherbee from Archie comics, who is obsessed with his dogs. The second series includes Geira, an obese Jabba the Hutt-esque man who hypnotizes people, and Gyoko, a man so fat that he sinks into the ground when he walks.
In Death Note, there's Demegawa, the corrupt TV producer and presenter. His greed and corruptness make one of Light's plans fail. Moreover, as Kira grows in power and influence, he throws himself wholeheartedly into the role of Professional Butt-Kisser when it becomes clear who's in charge.
Definitely an inversion, as he gets eviler as he gets thinner, from Fat Buu, to the trim-but-buff Super Buu who is evil but at least has a sense of purpose and a tiny germ of honor, to half-pint Kid Buu who's just a Omnicidal Maniac.
Averted with Kurita from Eyeshield 21, who is both one of the heaviest characters in the series and one of the nicest. This aversion only strengthens as the series goes on, where Kurita proves to everyone that he's also one of the TOUGHEST, most respected linemen in the whole world.
Few would argue that anyone in the Yu-Gi-Oh! franchise qualifies for this Trope than Takasu, the corpulent prison warden from Yu-Gi-Oh! 5Ds and one of the sleaziest characters in the show. Among the unpleasant tropes that could be applied to him were The Bully, Politically Incorrect Villain, Bad Liar, Sore Loser, and Cheaters Never Prosper. (And he has a bad habit of picking his nose, one of the few things American fans did not mind the dub editing out.) In fact, he was such scum that his boss (Rex Godwin, the Big Bad of the first season), was disgusted with him, and fired him after his brutal treatment of inmates became known.
Fats Buttcha from Air Gear. The guy (when first introduced) takes this term to a new extreme: apparently his "fat" is nothing more than a pool of blood, blood that he can subsequently pump into his arms. The Bastard part? Ikki thinks that he can win a race against Buttcha because the guy is so fat, but the latter tells the former that (in his mini-hulk mode) he is just thin enough to fit down the alley they both need to pass through, but fat enough that no one can get around him.
Averted in The Lucifer and Biscuit Hammer. While Shimaki is fat, he is very smart, competent, and probably the most valuable member of the group he's in. The fact that he is fat is barely even addressed in the series since it's just a physical characteristic and not part of his personality.
Nakai in Bakuman。 used to be sympathetic despite being overweight. But then he Took A Level In Jerk Ass and starts being manipulative once success starts going to his head, which disgusts the woman he viewed as his love interest. He ultimately gets Put on a Bus and moves back home with his mother. By the time he returns from his bus trip, he's even more overweight, has an even more repulsive personality and is currently working with the current antagonist of the series.
From an filler episode in Detective Conan, there's a fat bitch named Michie Uemori. She's a famous chef who crapped big time on four of her disciples note (stole her childhood friend's boyfriend and married him without second thoughts; refuses to help her daughter-in-law when she's a victim of Domestic Abuse; stole her best female pupil's recipes and made them pass as her own; denied economic support to her best male student) and still treats them like shit. And she becomes the Asshole Victim.
The titular monsters from Attack on Titan often show a predisposition towards being fairly pudgy, including at least one who may be wider than it is tall (and that's saying something).
Also the nobleman who was playing chess with Dot Pixis, and demanded that he make preparations to defend his lands rather than go to the front, saying that it was the job of the troops to be killed distracting the Titans.
And the merchant who holds up the evacuation of Trost by demanding that a cart that was too wide for the gate should be given priority over the people.