Here are some I remember from the Sunset Coast:
Lou Thesz
Argentine Rocca
Gorgeous George
Baron Leone
Sandor Szabo
Jules Strongbow (not to be confused with one of that name much later)
Lord Blears
Dr. Lee Grable (he was a hypnotist)
Mr. Moto

From a slightly earlier era:
Mike Mazurki
Henry Kulki
Buddy Baer
All of whom became character actors.