1) Buffalo Bills
James Cook, Damien Harris, Nyheim Hines, Latavius Murray
The Buffalo Bills may not have the top running back like the New England Patriots or New York Jets but the reason they have the best running back room in the AFC East is because none of the other teams have the combination of experience and skill sets that the Bills do.
At the top of the position should be James Cook, and truthfully his performance this year is make or break for the entire position. He has the talent to be one of the top playmakers in the entire NFL at the position and should now have the opportunity to showcase that with Singletary no longer on the roster.
He should be paired with Damien Harris, who is an excellent downhill runner that is only two years removed from a double digit rushing touchdown season. There is certainly durability concerns with Harris who has dealt with injuries in his career but the addition of Latavius Murray mitigates some of those risks as he brings a similar skillset.
This then leaves Nyheim Hines, who has ranked near the top of the league in receptions by running backs over the past few years. He wasn't heavily involved in the offense last year after the Bills traded for him during the season. Similar to what Murray is to Harris, Hines could step in for Cook as a receiver out of the backfield at any point and fill that role.
The Buffalo Bills have recently not been a great running team but with the moves made over the last year that should change moving forward.