David Spade in Benchwarmers. He was a total dork and had a funny haircut. That movie cracks me up.
Napoleon dynamite. ACtually he was in benchwarmers too and plays pretty much the same character.
Rob Schneider, deuce bigelow
Ken Jeong the chinese guy in Transformers 3 and also known as Chan from hangover.
Adam Sandler as little nicki. Terrible movie. Adam Sandler as the waterboy. Adam Sandler as the Zohan
booger from revenge of the nerds
Buddy the Elf from Elf(Will Ferrell)
Golem from LOTR