Actually Gene Roddenberry flew B24s in the Pacific.
Jimmy Stewert flew 18 combat missions as a pilot in B24s with the 453rd BG. Walter Mattheau was also an enlisted man in this particular group
Tom Landry was a B17 co-pilot with the 8th AF.
Clark Gable flew a number of missions in B17s early in the war.
George McGovern flew B24s with the 15th AF
Barry Goldwater flew B24s
Rod Serling was a paratrooper with the 101st in WW2.
Eddie Albert was in command of a landing craft during the Tarawa invasion
etc etc

Dan