30. Kevin James
Worst Performances: Paul Blart: Mall Cop (2009), Grown Ups (2010), The Dilemma (2011)
If done right, fat guy humor can be great. Just think about how funny John Belushi was in Animal House, or how shamelessly you'll watch a Chris Farley movie whenever one is on cable. Beyond the pratfalls and loudness that permeated their performances, those guys had subversive qualities to help transcend basic "sophomoric comedy." Kevin James, on the other hand, just falls down a lot. In any given James movie, he's bound to have something damage his testicles (a tree branch in Grown Ups, for instance), and that's where his comedic range ends. Hopefully he'll lose tons of weight soon, because the legacies of Belushi and Farley deserve much better.