Before Carson, Letterman or Leno arrived on the scene, Jack Paar set the late night standard, introducing the familiar guests-on-a-couch set that to this day remains the altar before which an endless parade of guests eagerly genuflect. Born in Canton, OH, he overcame an early stutter and began as a radio announcer, eventually entertaining the troops in the South Pacific as a noncombatant soldier during World War II. Back home, Paar initially returned to radio, then gravitated to the movies, one of which ("Love Nest" 1951) included the starlet Marilyn Monroe, and floundered for several years on