5. Jimmy Fallon
Jimmy Fallon has proved many of the doubters wrong ever since taking over for Conan O'Brien on NBC back in 2009. Despite Lorne Michaels' firm belief that he was the best man for the job, the former Saturday Night Live star was dismissed by many as too green for the big desk. Once again, Lorne was proven right, and the show became a monster hit. Last year, Fallon took over The Tonight Show from Jay Leno. Along the way, he managed to obliterate his competitors in the ratings and create a stunning amount of viral videos. Many critics have ripped into him for making guests play charades and engage in lip sync battles, but the ratings speak for themselves. Even the most jaded person has to admit his Saved by the Bell reunion was absolutely amazing.