@SMXLR8: first name come to mind was astro boy ( besides goku but i kno u don't like him)
@waybig1010101: did i mention they have to able to live in space
First off Goku IS the superman in anime/manga despite what the person in charge of this thread thinks. But since they don't want to admit the other obvious candidate would be Astro Boy. He's heroic, has some super strength,flight, and some invulnerability going for him. Like Superman he pretty much got manga started in the right direction. Other than that I guess if you wanna you can go with Superman in the Dr. Slump universe. Not Suppaman but actually Superman. His appearances are brief(maybe one or two scans) and he is referenced. Not a good example at all but he is there.
@Turambar: i said status to begin with
His need to live in space makes a difference how then?
Your seeming refusal to differentiate between the cultural status bestowed upon a character from the audience and the in-world status bestowed upon the character due to his characteristics makes this entire question a fool's venture.