Hope I don't duplicate, mine are all former Coast Guard unless noted;
Nick Adams - actor
Humphrey Bogart - 1944 Also volunteered the use of his yacht {Santana}
Beau Bridges - actor - 2 week reserve duty at Alameda one year while I was stationed there.
Jeff Bridges - same as above.
Lloyd Bridges - actor
Sid Caesar - comedian
Gower Champion - actor/dancer
Walter Cronkite - newscaster, USCG reserve/Auxiliary
Jack Dempsey - Boxer
Marlene Dietrich - actress - SPAR
Buddy Ebsen - actor
Arthur Fielder - orchestra conductor [Boston pops]
Charles Gibson - newscaster
Arthur Godfrey - entertainer
Gale Gordon - actor
Alan Hale jr. - actor
Wynn Handman - actor
William Hopper - actor
Robert Horton - actor
Tab Hunter - actor
Victor Jory - actor
Guy Madison - actor
Mont Markham - actor
Victor Mature - CG's post
Walter Sande - actor
Robert Stevens - actor
Rudy Vallee - entertainer
Tom Waits - actor
Patrick Wayne - John Waynes son - was at Alameda for boot camp just before I was transferred there.
Gig Young - actor
And a none actor, but famous family; William Randolph Hearst III - [Pattie Hearst is his sister] first met him doing dental exam for boot camp, was friend of his company CO, then he stayed at Alameda as perm, party after boot camp when I really go to know him - invited to family ranch at San Simeon to hunt.
Many other famous former Coast Guard, But others not during any war time I know of.