No, I'm not talking about Iron Man, Cap, and Thor, but the Big Three POWER wise. A guy named John Cimino (you should read his analysis on Wolverine vs. Captain America) who runs a blog named "Hero Envy" (and who knows quote a shit ton about comics, seeming to own and know like every one ever made) had this interesting tidbit to say:
To know the Marvel Universe you have to know about the "BIG 3". These 3 characters are at the top of the food-chain when it comes to levels of power for the greatest Marvel Heroes. These 3 characters strike the most fear and gain the most respect from opposing opposition. These 3 characters are without a doubt The Marvel hierarchy of ultimate power. They are The Incredible Hulk, The Mighty Thor and The Silver Surfer. Yup, these guys are the standard, and every other hero that wants to be deemed "super" is measured up against them to see how high up the ladder they are and regarded among peers. Here is how the "BIG 3" rank in certain categories between each other."
Strength and Durability: Hulk Skill and Mindset: Thor Overall Versatility: Silver Surfer
You can make an argument on who ranks second and third in each category between them, but there is no doubt that the character listed as number 1 is the rightful owner of that power-level. While Hulk has the edge over Thor in their battles, Silver Surfer has the edge over the Hulk, which leads me to this write up where Thor has the edge over Silver Surfer."