As a screen actor, Bob Balaban was often seen in character roles as buttoned up and usually bespectacled brains, with his deadpan performances in Christopher Guest films like “Waiting for Guffman” (1996) and “Best in Show” (2000) earning him a following with indie comedy fans. Many of those same fans – as well as ones who enjoyed his recurring role as the network executive who greenlights and then cancels Jerry and George’s sitcom project on “Seinfeld” (NBC, 1989-1998) – may not have known that Balaban also enjoyed a steady career behind the camera as a director of dark comedies for film and