Oh dear, you slay me! Superman, not just because I love him, but here's why. Despite the whole "oooh, he can be disabled by Kryptonite", you only have to find a bit of lead to make it go away. He's strong, fast, has heat vision, bullet proof and he can fly. I would have to say his powers are a combination of everything you would want to have if you were a superhero, which is why I think he's powerful.