I see:
Captain America (cause of the shield)
Iron Man (the circle on the chest resembles Iron Mans')
Thor (cause Mjölnir)
Thanos (cause the hand that's holding Mjölnir resembles the gauntlet)
Hulk (cause green boi and big)
The Skrull (cause head)
and Namor the Sub-Mariner (cause I saw scales)
not sure if the last one is correct but Namor is like the Marvel version of Aquaman