Jack Larson
Jack Larson is best known to Superman fans as Jimmy Olsen on the George Reeves Superman television show of the 1950's.  He's also showed up in the Superboy tv series, and he played older Jimmy Olsen on Lois and Clark on an episode where Jimmy gets stricken with old age. Not a lot of photos of Jack Larson himself floating around, but he is a very important part of the Superman television history.

Jack Larson photo colorized by Ben Burgraff