All answers are good ones Thumper. By now, I imagine you know that I have a great deal of respect for you and your opinions. I can not really go against any of your reasoning.
Only to say that I agree with you about Sayers. He was amazing. Not many know just how amazing he really was. Same with Jim Brown and many before them.
I look at all of these backs and ask myself, if you had to start a team from scratch, which of these backs could carry a team? Which of these backs could do it if there was nothing else?
That's why I pick Campbell. I mean, I'm a Texas Homer to begin with but even outside of that, I think you look at him and you have to be impressed with him. Campbell could not survive the long haul simply because of the situation. It takes a lot to know that your sacraficing health to win. Some might call it stupidity. I don't know. I just know that nobody has run like him (that I have ever seen) before or since. I think Payton is about as close as anybody has come and he wasn't succesful until he got more pieces around him.
There are a couple of other backs that I think should have been on this list but were not. I think Curtis Martin should have probably been on the list. I think Marshall Faulk, I think George Rodgers and maybe Jerome Bettis. Maybe a few others but be that as it may. All opinions are good ones in this case.