Just some thoughts:
How about The Showstopper, rather than The Strongman? Who's whole thing is being super-human, think early Superman. They could have moves to do with super-human strength, but they might also go for speed, or toughness, or even hearing. However, besides all that they'd be all about being impressive, they don't just catch a falling damsel, they do it and land perfectly. They can give rousing speeches too I imagine. Their fatal flaw might be difficulty outside the use of their physical might. They'd have to take moves from some other class to be useful outside immediate danger.
I love The Masked Avenger. They should get a bonus when fighting the thing they became an Avenger for, and the player should be encouraged to twist the character's world view so they can use it as much as possible. Began your career fighting gangster? Well... the government are an awful lot like gangsters, if you're a crazy man in a mask.
How about The Agent? Ordinary human, but used to the weird things. Part of an expansive organisation, with just enough back-up to get break even compared to the other characters. A big user of the move Retroactively Have Made a Plan, as in, they roll to see if other agents have been put in place, or if they knew the Yellow Oni Gang was going to be here. Early James Bond I guess. Or CIA. Has a sex move?