30. 'The Tonight Show With Johnny Carson'
Heeeeeeere's Johnny! There's a reason Carson remains the template for every late-night host, after ruling The Tonight Show for three decades. Like a TV answer to Frank Sinatra, he epitomized Rat Pack cool, and his monologues were a soundtrack to generations of Americans boozing themselves to slumber every night. Nearly 25 years after he signed off (and more than 10 years after he died), Carson's the ghost king who still haunts late night. When he abdicated in 1992, Letterman and Jay Leno began battling for his throne and somehow never quit. (In his final show, Letterman cracked, "It looks like I'm not going to get The Tonight Show.")