Jay Leno

A genial comedian who skewered the contradictions of everyday life, Jay Leno's Everyman persona and tireless work ethic helped him to earn one of the most sacred spots on television, replacing Johnny Carson as host of "The Tonight Show" (NBC, 1954- ). But his ascension to Carson's throne in 1993 earned him considerable spite from David Letterman - who was long considered to be the heir apparent - as both feuded behind the scenes and in public in the so-called Late Night Wars. Leno soared in the ratings while his "Tonight Show" was the most-watched show at 11:30 p.m. Meanwhile, Leno continued cultivating his everyman image by showcasing his love of cars and motorcycles, amassing a collection that totaled some 190 vehicles, and continuing to perform stand-up across the country on his days off. In 2008, NBC shockingly announced that Leno would be replaced as "Tonight Show" host by Conan O'Brien, and in an unprecedented move, Leno revamped his show for a 10 p.m. timeslot. A short time later, Leno would return to his customary timeslot as one of the mainstays of late-night programming.