IF Pacquiao somehow beats Spence it is right up there.. (I came from the poster I just saw on Twitter)
Simon Brown knocking Terry Norris into orbit at 154lbs. Brown had his courage opening questioned by Norris and his Manager after postponing the their fight because of a chest pains. I would have thought Simon had proven his character by then. He had been the Welterweight champion and had defended his title about 7 times.
Willie Pep's victory over Sandy Saddler. He had survived a plane crash that should have ended his career for good, yet he beat a top 30 ATG that was a stylistic nightmare for him, as well as one of the greatest punchers who ever lived.