5 Chris Hemsworth's Thor wasn't always a highlight of the MCU, but that's changed as of late. In Thor: Ragnarok, he proved that he's a lot funnier than these movies have often allowed him to be. As of late, it seems like this Chris is more than willing to pull his weight.
4 Scarlett Johansson was a star long before Marvel snatched her up, but her role as Black Widow has made her a superstar. She's been playing the part for a decade, since Iron Man 2. Although she doesn't always have a ton to do, she's been in enough of these movies to see some benefits in her bank account.
3 Bradley Cooper is another actor that's earned most of his money outside of the marvel, even so, his Rocket Raccoon is a special creation.
2 Vin Diesel has most of his money thanks to the Fast and Furious franchise, but it never hurts to collect a Marvel paycheck. As Groot, Vin has proved that he can provide quite a bit of emotional depth without using many words.
1 Robert Downey Jr. is the undisputed king of Marvel. His career went through a total renaissance after the first Iron Man, and his paydays rose as a result. For more than a decade now, Robert has been considered the god father of marvel franchise.