7. Robert De Niro - The Adventures of Rocky & Bullwinkle
It's probably a good thing that Robert De Niro doesn't seem to take himself too seriously. After all, when your name is synonymous with acting genius, it's probably pretty easy to let that go to your head. He's done other comedies before (Meet the Parents, Analyze This, just to name a few), other children's movies (Shark Tale, Arthur and the Invisibles), and whatever Stardust qualifies as. But at some point, you have to draw a line. And that line probably should be when they ask you to re-enact your famous Taxi Driver "You talkin' to me?" scene for a children's movie. While wearing a monocle. Yeah, that happened. Still, he's Robert De Niro and short of making another Meet the Parents sequel, virtually nothing he does now will really diminish his status as a screen legend. But come on.