Who would win this fight? SS and Hulk because SS would easily take Magneto then help Hulk. But if Red Hulk goes after SS and Magneto goes after Hulk then RH and Magneto would win because Red Hulk has already beaten SS and Magneto just takes control of Hulk. It all depends on who fights who.
magneto at full power vs surfer in a comic would be cool because they have similar powers and even though surfer is more powerful magneto is more ruthless so this fight won't be so short but in the end surfer wins without taking any real damage and I can see magneto shortly controlling surfer's metallic body before surfer blocks him it would be a cool look what I can do fight but surfer is clearly more powerful.