There are hundreds or thousands of games each narrowed down to its own particular subset of fantasy.
The big question is which particular things you want to have in your game, and which ones you want to leave out.
The rules set is not the setting, and it is generally to the point of calling something a "superhero game" that it facilitates creating all sorts of characters not provided for in rules sets devoted to narrower genres.
So, if you just want any old kind of narrower, then you can simply pass up everything that's billed as a "superhero game".
If you have something more specific in mind, then you can pick up whatever superhero game suits you. If you don't like Power X, then don't use Power X.
The big question is which particular things you want to have in your game, and which ones you want to leave out.
The rules set is not the setting, and it is generally to the point of calling something a "superhero game" that it facilitates creating all sorts of characters not provided for in rules sets devoted to narrower genres.
So, if you just want any old kind of narrower, then you can simply pass up everything that's billed as a "superhero game".
If you have something more specific in mind, then you can pick up whatever superhero game suits you. If you don't like Power X, then don't use Power X.