Superman: Jewish, landing in Nazi Germany, with all those powers.
It would have been a very brief Third Reich indeed.
Back when the cartoon was on, there was an episode where Superman landed in a parallel dimension (not bizarro world). In it, his alter ego had come to the conclusion that humans would never realize their potential without compulsion, so Superman became a dictator. I don't remember too much about it, except that I very much enjoyed the premise: a Superman who helps humanity to realize its natural goodness vs. a Superman who imposes his will on humanity to force them to be good.