Re: RB's..Brown #1..but Gayle Sayers definitely #2..
I think Payton deserves that #2 spot. Sayers may have been a more flashy, spectacular runner -- but Payton was far more durable over time and was really the "full package" when it came to running backs. Great runner, great pass-receiver, great blocker (and loved doing it, too), and even a good passer (he threw 8 TD passes in his career).