User blog comment:Whitekey/My ranking of the most powerful Marvel beings (A personal list)--Version 1/@comment-4040327-20110603135444

A few other cosmic beings that are probably up there, mostly from recent events and X-titles:
 * Amatsu-Mikaboshi, the Chaos King, is probably fairly high on the list given the recent Chaos War crossover. He wasted several pantheons like it was nothing, and was not able to be killed even by the head of the Earth pantheons at the time.
 * The Scarlet Witch has demonstrated reality warping powers on a global scale, going as far as creating an alternate reality/timeline before nearly wiping a species from the planet.
 * Mephisto has also demonstrated the ability to warp reality on a global scale. As much as I'm not a fan of One More Day, it shows how powerful he is.
 * There are a few other mutants that have demonstrated reality altering powers, such as Mikhail Rasputin and Legion.