2. Will Ferrell (1995-2002)

The Groundling improv troupe member-turned-SNL star was as versatile as they come, lighting up the screen during his stay on the series. It's hard not to think of Ferrell over and over while brainstorming the show's best sketches: From jackasses like George "Dubya" Bush, the Roxbury guys, and Robert Goulet to Cubs announcer Harry Caray and fictional cowbell player Gene Frenkle, Ferrell always managed to command attention and make viewers spit out drinks with his fearless, over-the-top approach to roles that made him a quintessential member of the team.