OAM, one thing you're leaving out is that the mere mortals you cited as "matching" Barry Sanders did so over more than one season, carrying the ball far fewer times per game. They were part of more balanced offenses who spread the ball around to more people.
Sanders was the largest part of the oSu offense the year he was a starter. That was not an award-winning O-line in front of him. Defenses could key on him with confidence. He carried the ball a lot. Yeah, the ball isn't' heavy, but 40 carries a game over the course of one season is a lot harder on a player than 15-20 carries a game spread over two or three seasons.
What's more likely: that an overwhelming percentage of neutral observers have wrongly concluded that--although he only started for one season--Barry Sanders is, or is at least very close to being, the best running back to play college football, or that you have an inexplicable blind spot on this issue?