i remember Strongbow, but just barely.
Another I remember was Ivan Putski.
The reason I can name so many is that faces rarely turned back then.
When Zybysko turned on Bruno, it was like the end of the world. I think that one started the trend, at least in Vinceworld.
It happened a lot during the Hogan era. Poor Hulkster could never keep a friend: Macho, Orndorff, Andre. I'm probably forgetting several.
Another is Tito Santana.
I don't recall Tony Atlas as a heel in WWE either.