Never underestimate a guy just cause he has no powers. To my knowledge, there are no canon versions of Batman that have any sort of powers other than Batman: The Dawnbreaker, an evil version of Batman with a Green Lantern Power Ring, as well as Red Death, who is another evil Batman who fused with his world's version of Flash. Main thing about Red Death though, he has Barry's voice stuck in his head, and he often has to fight for control, which can leave him vulnerable. If you were to ever face Red Death and he starts grabbing his head like he's in pain, that's the best moment to strike, that's when he's trying to force Barry to shut up. But besides those two versions, I don't know of any other Batman who have powers, and if there are, please enlighten me. But yeah, Bruce may be a human, but he's proven time and time again that you don't need superpowers to be a hero