To sum up this thread: every comedian
Ben Stiller is funny, so's Andy Dick, Jerry Seinfeld and Tom Green, so there ya go. The Andy Dick show was some of the most hilarious stuff I've ever seen.
Adam Sandler used to be funny, but then he got famous and rich (which tends to permanently influence a person's target audience) and has turned flat out unfunny. Billy Madison & Happy Gilmore are funny, Waterboy beyond aren't.
Jimmy Fallon. He quit SNL for a movie career. Dunno why, he's not any good.
Other than that.. no idea. I can't think of any right now.