Many of Stewart's greatest foes inspired his best work. We acknowledge this may be a minority opinion, but that wasn't the case with Glenn Beck. Sure, the fuming conservative gave The Daily Show plenty of great material thanks to his nut-job Fox News Channel show. But there seemed to be something deeply disturbing about Beck's tin-foil-hat paranoia that provoked not just humor but outright aghast disbelief in the comedian: He wasn't so much funny as he was apoplectic in response. How else to explain the special 2009 episode that was an extended parody of Beck's Tea Party-friendly 9-12 project, with Stewart going full method actor to conjure up his nemesis's wide-eyed insanity? Or the painfully sincere Rally to Restore Sanity and/or Fear in 2010, organized just a couple months after Beck's uber-patriotic Restoring Honor rally? Thankfully, Beck's political relevance has faded ever since Fox News dropped him in 2011, and the show's host could focus his righteousness and furious anger elsewhere.