Maybe Floyd Little? Only rushed for 1,000 yds once, 6,323 career yds, 3.9 yds average per carry, 43 TDs. He did make 5 Pro Bowls and led the league in rushing one year, but I gotta believe he made Hall on his return abilities.
I disagree. From 1983-1985, he may have been the best running back in football (I'd have Dickerson #1 - but it was close): 5,844 YFS; 43 TDs + the '84 postseason in which he dropped 466 in 3 playoff games (8 YPC) and carried the Raiders to the title (with 191 rushing yards rushing in the Super Bowl). He generated 1,000+ YFS in 11/16 seasons and scored double-digit TDs 7 times. When he retired, only Jerry Rice had more total TDs in the entire history of the NFL - 19 ahead of Jim Brown. Yes, he played a long time and compiled numbers. I wouldn't say it's my favorite path to the Hall. But... Marcus Allen was good for a long time. His final three seasons in KC, he generated 2,800 yards, 4.1 YPC and scored 25 TDs - and he was mostly the back-up.