I think I'm going to vote for Adam. He's got the AP advantage and could adapt relatively well during his first fight against the Guardians. The other times the Guardians fought him weren't really fights. When Adam tried to get Rocket from Gamora, he instead chose to save his mother when he saw the planet was erupting. And when he ambushed Quill and Gamora in the ship, Gamora held Blurp as a hostage and distracted him long enough for Quill, Gamora and Blurp to escape. So they never really beat him in a one-on-one fight.
A restrained Captain Marvel could only use her photon blasts in a limited manner and mostly just emitted them from her hands to fire small energy blasts from what I recall. Even though she has experience and hand-to-hand combat, I don't think that's going to be enough here. Drax had those things, and even though he had the advantage initially, it didn't take long for Adam to turn the tides and beat him senseless using his energy blasts. She could possibly knock him out in the beginning if she's smart and effective, but I think it's more likely for Adam to overpower her before she has the chance.
