What no Superboy Prime? He should count as he was the "Superman" from his universe.
I'd have also liked to have seen Superman from Secret Identity get his respect. It's easily my favorite complete Superman story ever.
EDIT: Seriously if you have not read Secret Identity, go do so now. It's a wonderful read and continues to hold up well.
EDIT2: I just realized that these both are different tellings of the same concept. A boy born in the "real word" where the comicbook version of Superman exists in print and other fictional media and where he one day finds himself waking up with the character's powers.