20. Robert De Niro (The Adventures of Rocky and Bullwinkle)
The Oscar winner is celebrated for his intense dramatic performances. He’s had some success with comedy, but Rocky and Bullwinkle proved to be an absolute low point for the actor. In the film, He tries to lampoon his Travis Bickle “You talkin’ to me” scene, but instead he just comes off like a geriatric crazy person with a really bad haircut.
Image Source: IMDb