
On a side note, Aokiji doesn't quite fit the "Mean" part of this trope unlike his fellow Admirals (namely Aka inu).
One Piece: Pre- Time Skip, the three Admirals are all tall and thin. Orochimaru from Naruto is a fairly tall, lean man. Yoshiyuki Tomino liked his women with a bit of meat on their bones, which was why the villainous Kycilia Zabi of Mobile Suit Gundam was noticeably skinnier than the rest of the female cast. Viper Snakely from Kimba the White Lion. Hellsing's Rip Van Winkle is extremely tall and thin. In Guardian Fairy Michel, Boogy is the thinnest of the Black Hammer Gang besides Salome and is her second-in-command. And "mean" rarely defines someone as it does him/her/it. Incredibly slim and muscular with a form-fitting body suit that really extenuates the slim physique. Envy from Fullmetal Alchemist, more so in the 2003 anime version. He's mean, but he's more an anti-hero than a villain. Eyeshield 21: Purposely invoked with Hiruma, who's supposed to resemble a devil. Izaya Orihara from Durarara!! manages to be the skinniest person in a cast of Noodle People. Zamasu must have put less emphasis on physical training and more on just fighting powerful opponents to get stronger. Strange since Black's body is an alternate version of Goku's. He's also, in utter contrast to Goku's All-Loving Hero status, extremely sadistic without a merciful bone in his body. But one of the most noticeable differences aside from clothing is that he's physically thinner. Goku Black, an antagonist of Dragon Ball Super, looks nearly identical to main protagonist Goku. Beerus from Dragon Ball Z: Battle of Gods sticks out for being very lean compared to the more muscular members of the cast, even sporting visible ribs and mostly resembling a humanoid hairless cat, and he's also the God of Destruction who could order Frieza around. Super Buu is more buff, but Kid Buu goes right back to being slender, along with terrifyingly insane. Evil Buu is nigh-emaciated, in great contrast to Fat Buu.
Their present-day counterparts, on the other hand, avert it as they're quick to make a Heel≯ace Turn. Gero's most powerful creations and their alternate future selves devastated Future Trunks' world.
Androids 17 and 18 (though not 16 and 19) have the physiques of normal teenagers, but they're among Dr.Gero is quite thin, and he's also a Mad Scientist obsessed with revenge against Goku. He's a sadistic galactic conqueror who was born one of the most powerful mortals in the universe. Frieza's true form is quite slender (though he buffs up again when using 100% of his power).Light Yagami, an Evil Genius, is also very thin as described in "How to Read" and he is specifically said to have lost weight due to stress when he took on his "duty". She appears as The Ditz to most people, despite being rather clever herself and she is the Second Kira, though her low weight and lean figure can also be explained as being due to her job as a model. Bleach: Nnoitra, As Nodt and Nanana are both very thin villains, even by the thin standards of the story's characters.