This chunky and endearing actor has made the transition from playing buffoonish characters in teen fare to playing doctors and other professionals of dubious abilities but whose bumbly charm makes malpractice palatable. Stephen Furst is best recalled as Kent 'Flounder' Dorfman in "National Lampoon's Animal House" (1978) and as Dr. Elliot Axelrod, fighting obesity and questions of his competence, on the NBC series "St. Elsewhere" from 1983-1988.Born in Norfolk, VA, Furst was orphaned at age 16 and he lived with an aunt before attending college. By this time, he had found two vices to fill the