In your opinion, who is the greatest football player of all time in the NFL?

Jim Brown was the best on offense, period. I feel like you can't call a corner the greatest defensive player of all time because of how easy it is to neutralize him, by simply not throwing to his receiver. I think I'm going to say either Deacon Jones or Ray Lewis, Deacon because he dominate his era like no one else, and Ray because he seems to singlehandedly make the Ravens a top defense with his presence.