Hulk does beat Wolverine. He can't beat Superman, Supes is way faster, considerably stronger, can fly, has heat vision that can fry and entire planet. And where the hell is the Hulk going to get a giant piece of Kryptonite?
Silver Surfer DOES NOT NEED HIS BOARD FOR HIS POWER! THATS ONLY THE FILM! The Surfer would absolutely annihilate the Hulk.
Thor beats the Hulk in a good fight. He is just as strong and considerably more versatile.
None of these guys are except Surfer are close to being the most powerful Superheroes though. For that you want the likes of White Phoenix of the Crown, Current Hercules, Shaman Nate Grey, Dr Solar, Mr Majestic etc