Superman (Stan Lee)

Superman was originally known as Salden, a alien police officer who came to Earth to catch a criminal from his world, Gundor Gorrok, who murdered his wife. Salden found that his species gained great strength on Earth thanks to the lower gravity, and he soon found himself seen as a superhero- thanks in part to talent agent Lois Lane. Salden wasn't impressed by Earth, but chose to fight crime there in the hopes it'd make it possible for him to get home. (Less crime meaning more time for humanity to advance technologically, he figured.)