Uh, how about Dallas? Calvin Hill, Duane Thomas, Tony Dorsett, Herschel Walker, Emmitt Smith and E.Elliott.
However, after thinking about it more, it's tough to beat a history of Cookie Gilchrist, OJ, Thurman, Fred Jackson, McCoy, plus a few good years each from the likes of Joe Cribbs, Travis Henry, Willis McGahee and Marshawn Lynch. That's a lot of 1,000 yard seasons.
I believe I recently heard some discussion about the Detroit Lions not having a 1000 yard rusher in several years, with the last one being Reggie Bush.