Hulk's calling card is referring to himself as "the strongest one there is". However, over the decades since his introduction, several of the most powerful Marvel characters have challenged this claim. Many fans often like to reference Thor's Asgardian strength and god-like abilities, while others bring up cosmic heroes like the Silver Surfer, who's shown incredible strength of his own.
Source：https://www.cbr.com/most-powerful-characters-in-the-marvel-universe/
