Basically cartoon characters that like toturing people, that are violent, even a bit psychotic, enjoy seeing people in pain and are downright evil.
The Top Ten
1Peter Griffin - Family GuyPeter Griffin is the main protagonist and titular character of the American animated sitcom Family Guy.
The most sadistic cartoon character ever created. He tortures his own daughter, costs the lives of many innocent civilians and doesn't even care about the people that he's hurt.
2Stan Smith - American DadStanford Leonard "Stan" Smith is the main protagonist of the adult animated sitcom American Dad!. He is voiced by the series' co-creator and executive producer, Seth MacFarlane.
He's basically like Peter Griffin but more political and less stupid.
3Eric Cartman - South ParkEric Theodore Cartman is one of the main characters in the animated television series South Park, created by Matt Stone and Trey Parker, and voiced by Trey Parker.
"Scott Tenorman Must Die." Enough said.
4Stewie Griffin - Family GuyStewart Gilligan "Stewie" Griffin is a main character from the animated television series Family Guy. Obsessed with violence and matricide, Stewie is the youngest child of Peter and Lois Griffin, and the brother of Meg and Chris Griffin.
I don't think I need to explain why for Stewie.
5Ren Hoek - Ren & Stimpy
He has real anger issues especially in: Adult Party cartoon.
6The Lich - Adventure TimeThe Lich (formerly named the Lich King in the original pitch and "His Hero," and referred to as Sweet Pig Trunks in his baby form, or just Sweet P for short) is a powerful undead being and a major antagonist in the American animated series Adventure Time.
Had to include him at some point...
7Slade - Teen TitansSlade is a fictional incarnation of the character Deathstroke in the American animated series Teen Titans and is the archenemy of the Teen Titans, who wants them destroyed for his own unknown reasons, and is the main antagonist of Season 1 and Season 2; He appears as a vision in Season 3, returned only ...read more.
While he is iconic he has proven to be quite sadistic.
8Him - PowerPuff Girls
I think the image says it all really.
9Curly - Hey Arnold
Do I really need to explain why for this one?
10Rick Sanchez - Rick and MortyRick Sanchez is a fictional character from the American animated television series Rick and Morty, aired on Adult Swim.
While he is a good character he is sadistic to somewhat of a degree.