Campbell is probably my favorite, along with Walter Payton.
But I'd say #1 is definitely Barry Sanders. He only had one year under 1,200 yards and thats because he only played in 11 games. #2 - #5 could be argued day after day after day.
I do have a question for the thread starter. Why no LaDanian Tomlinson one of the selections. In my opinion he is in the 2-5 range.