Can any hero defeat superman in a fair fight?

The only verified entity available in the evidence is Superman. No other characters, heroes, or combat outcomes are documented. Consequently, there is no factual basis to assert that any hero could overcome him in an evenly matched encounter. Without additional data on other characters’ abilities, tactics, or narrative contexts, the question remains unanswered. The lack of evidence means we cannot claim that any hero is capable of defeating Superman, nor can we say that he is unbeatable; the conclusion is simply that the information is insufficient.