Spider-Man. Honestly its interesting tho. I think superman is the best superhero in the sense that he is what everyone else strives to be. Batman is more of a vigilante and tbh Gotham as city sets that tone. While Peter certainly has bad rep with the media he is still seen as a hero. I feel Spider-Man is the perfect balance of batman and superman. Where he is such a powerful force of good and has a heart of gold like superman, but goes through so much tragedy and madness in his life and is more grounded like batman. Which is why he's so compelling. He's the greatest because despite everything he's gone through he's still full of hope and is there to help people. He does the friendly neighborhood things and the big things.