It's a pretty simple answer to this question. Emmitt is no where near the top. 
All of the top backs played for shit teams most of there career. Name a QB and top WR for Payton in his first 5 seasons, or for Barry Sanders, or Jim Brown, or Gale Sayers. Most won't know it.
But Troy Aikmen and Michael Irvin are like house hold names. Shit a good amount of people can name half the starters on the old Cowboys Offensive Line. 
