I don`t think Conor has the power to have much success against harder punchers in boxing, I feel he only lasted so long vs Floyd because of their size difference. McGregor came in after the weigh in at 170lbs! I feel any decent puncher near that weight would KO him quicker than Floyd, does anyone disagree?
Probably any world ranked fighter. Mayweather carried him for show. Notice how the only rounds McGregor won were the ones Mayweather barely threw anything.
I think Conor needs to learn what a kinematic chain is before he tries hurting people who get hit by guys who do.