17. Chevy Chase
Years on Show: 1975-1976
Most Memorable Sketches: "Weekend Update," "Land Shark," "Word Association" and his many appearances as Gerald Ford
Post-Show Career: His 1980s movies like Fletch, National Lampoon's Vacation, Spies Like Us and Caddyshack will live forever. It's been a little rocky since then, but he was in both Hot Tub Time Machine installments.