Telekinesis.
Why? Because you can do anything with it, provided you're powerful enough. It isn't limited to just moving objects around; you could collapse buildings and bring planes out of the sky. If you're telekinetic, you don't need to be able to fly, becasuse you can use your powers to make yourself fly. You could stop bullets in mid-flight and turn them back on people; you could cause things to burst into flame and burn people. If you're powerful enough, you could affect matter at the molecular level: you could turn coal into diamond; you could cause solid structures to melt away before you; you could cause your enemies to turn to gas.
Anything is possible.