Vidal Sassoon: Anti Nazi street fighter. Bad fucking ass.
Jimmy Stewart: WWII bomber pilot - he was 40 when the war ended and had to fight for combat duty due to his age. Flew a non-combat mission in Vietnam.
James Doohan: Shot six times at D Day, and a cigarette case stopped a bullet to his chest.
Christopher Lee: Stone cold killer in British Special forces. Supposey challenged Peter Jackson as to the sound a person makes when they get a knife to the back....because he had heard the real thing.
Mel Brooks: Combat engineer.
There are many more, but these are my favorites.