Here is one of the threads searching the common name for William Campbell.
Please note that there are many other William/Bill/Billy Campbell out there…

William Campbell (1923): Actor; aka.  Bill Campbell, William J. Campbell
Born October 30th, 1923 in Newark, New Jersey, USA; died April 28th, 2011
Known for: Dementia 13, Cannonball, Hush… Hush, Sweet Charlotte, Love Me Tender, Quincy M.E. and numerous TV Shows from '50s to the '80s
Documentation: Wikipedia, IMDB as William Campbell (I), Memoy Alpha
1923:


Bill Campbell  (1)
• Operation Pacific - confirmed by AiAustria

William Campbell  (5)
• Escape from Fort Bravo - confirmed by greyghost
• The High and the Mighty - confirmed by ruben.
• Star Trek S01E17 - confirmed by AiAustria
• Star Trek S02E15 - confirmed by AiAustria
• Star Trek: Deep Space Nine S02E19 - confirmed by AiAustria

William J. Campbell  (0)

Unconfirmed  (74)
• Adam-12 (TV Series)
• Backlash
• Battle Circus
• Battle Cry
• Big Leaguer
• The Bigelow Theatre (TV Series)
• Black Gunn
• Blood Bath
• Bonanza (TV Series)
• Bracken"s World (TV Series)
• The Breaking Point
• Breakthrough
• Cannonball (TV Series)
• Cavalcade of America (TV Series)
• Cell 2455, Death Row
• The Christophers (TV Series)
• Code Two
• Combat! (TV Series)
• Dementia 13
• Dundee and the Culhane (TV Series)
• Eighteen and Anxious
• Emergency! (TV Series)
• Fearless Fagan
• Four Star Playhouse (TV Series)
• Garrison"s Gorillas (TV Series)
• Goodyear Theatre (TV Series)
• Gunsmoke (TV Series)
• The Hardy Boys/Nancy Drew Mysteries (TV Series)
• Hec Ramsey (TV Series)
• Holiday for Sinners
• Hotel (TV Series)
• Hush.. Hush, Sweet Charlotte
• Inside the Walls of Folsom Prison
• Ironside (TV Series)
• It Takes a Thief (TV Series)
• Kung Fu: The Legend Continues (TV Series)
• Letter to Loretta (TV Series)
• Love Me Tender
• Lux Video Theatre (TV Series)
• Man in the Vault
• Man Without a Star
• The Manhunter (TV Series)
• Marcus Welby, M.D. (TV Series)
• The Master (TV Series)
• Medical Center (TV Series)
• The Millionaire (TV Series)
• Money, Women and Guns
• Mr. and Mrs. Cop (TV Movie)
• Mr. Garlund (TV Series)
• The Naked and the Dead
• Natchez Trace
• The Next Step Beyond (TV Series)
• Night of Evil
• O"Hara, U.S. Treasury (TV Series)
• Operacija Ticijan
• The People Against O"Hara
• Perry Mason (TV Series)
• Philip Marlowe (TV Series)
• Police Woman (TV Series)
• Portrait in Terror
• Quincy M.E. (TV Series)
• The Return of the Six-Million-Dollar Man and the Bionic Woman (TV Movie)
• Running Wild
• Schlitz Playhouse of Stars (TV Series)
• The Secret Invasion
• Shazam! (TV Series)
• The Sheriff of Fractured Jaw
• Small Town Girl
• Stagecoach West (TV Series)
• The Streets of San Francisco (TV Series)
• Tales of Wells Fargo (TV Series)
• Telephone Time (TV Series)
• The Wild Wild West (TV Series)
• The Young Racers

Can anyone check the remaining unconfirmed credits above?
Does anyone have other titles of him in his database?

Escape from Fort Bravo - William Campbell

Dementia 13 - William Campbell
Battle Cry - William Campbell

William Campbell : Battle Circus

William Campbell : Backlash

William Campbell : The Sheriff of Fractured Jaw

Bill Campbell as Cpl. Danny Dominick in Breakthrough

Return of The Six Million Dollar Man and The Bionic Woman:


It Takes a Thief: Season 1, Episode 8:

Cell 2455, Death Row --> William Campbell
Love Me Tender --> William Campbell
Man Without a Star --> William Campbell
Money, Women and Guns --> William Campbell
The People Against O"Hara --> William Campbell
The Secret Invasion --> William Campbell
The Young Racers --> William Campbell