Silver Surfer has unlimited energy as well. Any where there is matter, he can absorb it. Let's not forget about Infinity Crusade when he absorbed enough energy from the sun to destroy a planet. In an issue of Guardians of the Galaxy set in the future, he had the power of Quasar along with the power cosmic and defeated Galactus. He's matched Superman for crying out loud. If Hulk is the most powerful earth bound being then surely the Silver Surfer is the most powerful cosmic one, at least a tie. Although I am curious as to why Jean Grey isn't on this list.