Older Films
Mr. Potter from "It's A Wonderful Life". The Alpha and Omega of rich, business tycoon assholes.
Lord Ravenhurst from "The Court Jester" will finish you off with a mere snap of his fingers.
While somewhat likable, Max Bialystock from "The Producers" ought to qualify just for preying on the loneliness of little old ladies.
Modern Films
Biff Tannen, any age.
Cloverfield. Pick a character,
any character.
Mr. Teatime from "The Hogfather".
Groups
The E-XTREME sports punks who listen to Wilson Phillips from "Harold and Kumar Go To White Castle".
The entire bridge and gunnery crews of Spaceball One, literally.