Superman is one of the most iconic figures in all of pop culture. He's such a deeply set symbol that most of Earth's population at least knows who he is. But why aren't his villains as well known? Batman has great villains, Flash has great villains, Spider-Man has great villains. But Superman? Does he have great villains? I mean, yes. Yes, he VERY MUCH does. Don't believe me? Let's take a look.
10. Mr. Mxyzptlk
If there's one Superman villain who gets more hate than he deserves, it's good ol' Mxy here. And that's a shame, because he's finally hitting a renaissance.
The character first appeared in 1944's Superman #30, but he remained pretty forgettable until the fifties, when he started thriving. The Silver Age was the perfect time period for Mxy's shenanigans. They were exactly the kind of weirdness that matched with him perfectly. He stuck around in a D-list role for a while after that, popping up on occasion.
He did, however, get a solid star turn in Whatever Happened to the Man of Tomorrow, because Alan Moore is pretty great. He read Superfolks, and accidentally stole a bunch from it without realizing it. He would become a big deal in the late nineties/early two thousands, which was when the fun returned to superhero comics. And after a lackluster New 52 incarnation, he's back in full force for DC Rebirth.
Thank you, Action Comics, for making this wonderful little man meaningful again.