New Brevoort Formspring

i know that you despise battleboard questions, but are there in your opinion any superheroes that could be said to be "limitless" in their overall potential? i personally believe that Hulk is not alone in such a class, but many vehemently deny the possibility that Sentry, Thor, Surfer, Black Bolt or similarly high powers could be a challenge for the Hulk... Hulk is the strongest one there is when enraged enough, but i believe that there is more than strenght to a character...