With Peter Marshall's passing, who, from that show, is still alive? Semi-regulars only, not a giant list of people who were on for a week.
John Davidson still performs weekly at his club in Sandwich, NH (called, appropriately, Club Sandwich), for a few more months. Karen Valentine, Ruta Lee, Jimmie Walker, Robert Fuller, Demond Wilson, and Rich Little are still with us, as long as someone retrieved Rich before the Tropicana closed. I'm sure there are others who would qualify.