5. Tina Fey (2000-2006)

Before unassumingly sexy Saturday Night Live veteran Tina Fey added New York Times Best Seller and Emmy Award-winning comedy creator to her resume, she served as SNL's head writer, the first female in history to secure the spot. While Fey didn't take on the same number of characters as her colleagues, she was able to do more with less, her appearances as co-anchor of Weekend Update earning her frequent praise from critics. Additionally, her stint as Sarah Palin while the then-Alaskan Governor was on the campaign trail became of one the most famous impressions on the show—and is rumored to have helped alter the course of the election.