If not then Peter Parker’s Spiderman. Yes it’s cheating, he is, by a wide margin, the best selling comic book character. There’s a good reason he’s so popular. The books are good. I don’t know why the movies haven’t picked up on this but one of the best things about the character is that you get to see him grow up and develop both as a superhero and through his transition from teenager to college student to working adult. He doesn’t start out as a fully developed hero saving the world at every turn. You see him making mistakes and you see him discovering and figuring out how to overcome his flaws. As he grows up and becomes more competent as a hero he never becomes the perfect fully developed superhero a la Superman or Batman. As he figures out one part of his life he transitions into another and has a whole new set of challenges to overcome. And despite never becoming that mythic figure he’s still an Avenger. Despite just being your friendly neighborhood Spiderman, he’s still fought and defeated the biggest and baddest of the Marvel rogues gallery.
Groo the Wanderer if he counts as a Marvel character. https://en.wikipedia.org/wiki/Groo_the_Wanderer
If not then Peter Parker’s Spiderman. Yes it’s cheating, he is, by a wide margin, the best selling comic book character. There’s a good reason he’s so popular. The books are good. I don’t know why the movies haven’t picked up on this but one of the best things about the character is that you get to see him grow up and develop both as a superhero and through his transition from teenager to college student to working adult. He doesn’t start out as a fully developed hero saving the world at every turn. You see him making mistakes and you see him discovering and figuring out how to overcome his flaws. As he grows up and becomes more competent as a hero he never becomes the perfect fully developed superhero a la Superman or Batman. As he figures out one part of his life he transitions into another and has a whole new set of challenges to overcome. And despite never becoming that mythic figure he’s still an Avenger. Despite just being your friendly neighborhood Spiderman, he’s still fought and defeated the biggest and baddest of the Marvel rogues gallery.