I lean Jim Brown as the GOAT, but for a lot of these youngsters, they haven't seen him so they don't know diddly squat. Barry is in the convo too. Problem with JB is that it's been so long since he played, most of the people that were around to see him play are dead. We see this in basketball as well, guys don't remember Wilt, Bill and Kareem(Most never saw them play) so when you have conversations about players, they get forgotten.
I will say this, Eric ****erson was a special talent. The problem was that due to how bad the teams were around him, he eventually broke down. He had some huge years, but once he left LA people completely forgot about him. Imagine a tailback carrying a team to the playoffs. ED did that.