On panel comments and claims by characters when not backed up by feats are less than nothing in debates where only conclusive on panel evidence counts. I have no doubt that when Beyonder was created in his time he probably was the most powerful Marvel character, however since then other characters have been written to be debatably more powerful and conclusively have better feats than anything he ever did. As i said before he was good in his day but how he'd compare in that form to powers like the IG, HOTU and the White Crown Phoenix is debatable, however theyve all at least got better feats.
But wouldn't the existence of more than one TOAA by definition contradict the name and existence of TOAA itself. i personally think it more likely there is one TOAA which transcends the multiple universes
I agree, and IMO the most powerful fictional character we've seen in Marvel so far is the Red Brother.
He was the sum of EVERYTHING in Marvel. For all intents and purposes, he WAS Marvel. LT was awed by his power, he even tried to stop the Brother, and it did nothing.
I personally would place him above Beyonder for that reason alone.
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"I am tired of Earth. These people.
I am tired of being caught in the tangle of their lives."