Superheroes have been a thriving part of nerd culture ever since Superman smashed onto the scene in 1938. DC and Marvel have been the headliners for superheroic adventures and endless storylines for decades, both reinventing the genre and keeping the tradition of it alive. Videos by ComicBook.comSome of the most iconic superheroes in the world have been made by people and companies that have never had anything to do with Marvel or DC. 9) The SpiritWhile most superheroes emerged from comic books, the Spirit actually made his debut in newspaper comic strips. So there we have ten of the best non-Marvel and DC superheroes.