Board Thread:Questions and Answers/@comment-6312663-20160201132419/@comment-1038387-20160201133105

Black Mask and Red Skull have only superficial similarities. Black Mask is most definitely not a Nazi. He's a gang lord.

The others are pretty commonly cited for their similarities.

I'd like to add Captain America/Captain Atom to that. Both gain their powers after a government experiment, and both experience a time jump to the present.