Probably Darkness. I don't know it very well and I'm under the impression that he's weaker than Piccolo, but his power scope is far more practical and useful in daily life and what not. Let's see. Would you rather have the powers of Wolverine or Colossus?
I don't think he's weaker than Piccolo.
Darkseid .Omega beams, poof.
Mr. Immortal or Kenny from South Park?