The only character out of the ones you listed who could potentially destroy a planet there is Nono, and she's nerfed by being unwilling to use any of those abilities due to potential collateral damage as discussed by her player. She was accepted because of that. None of the characters who can do those kinds of things and aren't nerfed by personality or other methods of nerfing aren't accepted.

He's fine as is, I just want to know that he won't ever get to the level of casual planet destruction from near death powerups.