Bob Steele
What imressed my young mind years ago was the scene where Bob Steele tries to beat up Lon Chaney and Chaney lifts him off the floor and crushes his hand. I always thought Steele was perfectly cast as Curly if you had watched him beat up Charles King in countless westerns. The only actor I can remember him fighting his own size was Mickey Rooney in KILLER MCCOY.
I think Steele made a wise career move, similar to Tom Tyler, in taking character rows in A pictures, thus prolonging his career into the 70's.