Conan O'Brien
Conan got his first start in comedy as a writer for Saturday Night Live and The Simpsons.  Conan hosted Late Night from 1993 to 2009.  In 2009, he replaced Jay Leno as host of The Tonight Show.  In 2010, NBC decided to give The Tonight Show back to Leno, which led to Conan leaving NBC.  Many people were upset that Conan had to leave.  After leaving The Tonight Show, Conan grew a beard and went on a comedy tour.  On November 8, 2010, he hosted a late-night talk show on TBS called Conan, which ended in 2021.