21. Molly Shannon (1995-2001)
Shannon, who joined the cast in the midst of Lorne Michael's notorious 1995 overhaul, was a triple threat: funny, good-looking, and a pro at playing awkward women you'd never want to get stuck in a social situation with, yet can't seem to avoid. The epitome? Mary Katherine Gallagher, the world's most unappealing Catholic schoolgirl, who can't stop shoving her fingers in her armpits, speaking in made-for-TV monologues, and being so damn quotable that Shannon's Superstar movie feels like it's destined to haunt you forever.