Re: Name fights where an ATG was just dominated at or near their prime
DLH-Trinidad. 9-3 style victory where Trinidad got tooled.
Pacquiao-Barrera I. Barrera was the best featherweight in the world after dominating Hamed, but Pacquiao moves up in weight and smashes him.
Foreman-Frazier I comes to mind, as does Foreman/Norton.