A lot of other heroes would try to use him as an arguing point for their shitty lifestyles but a handful would actually get along pretty well. I can see him working with the Fantastic Four, he's basically Silver Surfer with midwest ideals.
How would he do in the Marvel universe?
Easton Brown
Brody Sanders
Thunderbolt Ross now hunts Superman during his off days when he is not hunting Hulk.
JJJ runs a smear campaign against Superman and asks Clark Kent to write the hit piece.
Gets mindraped by Cassandra Nova into attacking Genasho and massacring the mutants.
Superman at one point was a member of the Fantastic Four with Nighthawk, Namora, and Spitfire.
Got his own Clone Saga event that gave birth to Superman Slayer aka Doomsday, Bizarro, Kon-El, Cir-El, Cyborg-Superman and Eradicator.
Hyperion is Superman’s cousin.