The Incredible Hulk Comic , is also Namor's victory, but there were about 11 Avengers with him, and the only reason one of them defeated the Hulk was because the Hulk weakened as the battle progressed.
Yes, Hulk also beat Namor throughout his storyline, especially when the two fight out of the water. But guess what? Ryan Coogler didn't say Namor was always as good or stronger than the Hulk.
He said he's on the level of Hulk's strength if there's enough water around him. It's perfectly in line with the comic book storyline, and anyone who says otherwise is a Hulk fan who can't stand having a rival in his precious green baby.
Weak, so if Namor has a strength that matches Hulk, then he can match Thor.
Thor and Namor have fought him only 3 times in history that I know of. Thor and Invaders , Avengers