There were quite a few more current or future actors flying in WWII, including
Gene Autry - Flight Officer, Air Transport Command
James Best - US Army Air Corps, bomber gunner
Jackie Coogan - US Army Air Corps, glider pilot for commando missions
Brian Keith - USMC, aerial gunner
Jack Palance US Army Air Corps. B-24 pilot
Tyrone Power - USMC Pilot, flew supplies in and wounded out of Iwo Jima and Okinawa
Daniel Pleasance - RAF Pilot, Lancaster pilot
There were many, many more with notable WWII non-aviation experience, including
James Arness - US Army, wounded at Anzio. Purple Heart and Bronze Star
Eddie Albert - US Navy. Drove Amtracks in several Pacific invasions including Saipan and Tarawa, Bronze Star
Douglas Fairbanks Jr. - US Navy. served on the Battleship Massachuesetts and was a Commando raider
Audrey Hepburn, child courier for resistance fighters in Holland
Patrick MacNee British Royal Navy, commanded torpedo boat in North Sea
Lee Marvin - US Marines -wounded at the battle of Saipan where he was one of only nine survivors of his unit
Rod Stieger - US Navy, torpedoman
Henry Fonda - US Navy, destroyer and air intelligence officer - Bronze Star