OJ was great. Thurman, everyone I believe know my opinion, as I get very protective when idiots compare Willis or Travis to him (not even close guys). bruce, Jimbo, etc.. are great.
But James flat out went 3 years (I believe) without ever giving up a TD to his receiver that he covered. He was the ultimate shutdown corner and team player. Not flashy like Sanders but a better pure cover. If it wasn;t for injuries that shortened his career, people would be saying Sanders was the second best corner ever.