The correct answer should be C. the Silver Surfer
Sure he helps the Earth from time to time, but in the end he is basically a space entity superhero type of a character that does whatever he wants. Of course, he does even work for Galactus who wants to devour the planets and Silver Surfer doesn't really help those planets or cares for them. Of course, different stories present him differently, but the basics are that he's an anti hero.