11. Bill Hader
Years on Show: 2005-2013
Most Memorable Sketches: "Stefon," "Laser Cats," "The Californians," "Herb Welch," "Kissing Family"
Post-Show Career: It's been less than two years since he left, but he's already been in The Skeleton Twins and he's going to voice characters in the upcoming Inside Out, The Good Dinosaur and Angry Birds.