Johnny Carson

Johnny Carson remains the undisputed king of late night, hosting The Tonight Show for 30 years with effortless charm that set every subsequent standard in the genre. Carson's tenure produced 4,531 episodes, featuring a masterful timing that launched more comedy careers than any person in history—including David Letterman (#2), Conan O'Brien (#3), and countless others. Even 30 years after his retirement, his monologue style is still copied by over 90% of current hosts, outperforming #2 Letterman in cultural longevity. No host has matched his 45% higher ratings peak than the average successor, cementing his legacy as the bedrock of late night television.