I'll throw out a few names.
Free Agency
Devonta Freeman - Wouldn't cost us a comp pick, but there's obviously concern that he's washed.
Isaiah Crowell - Could cost us a comp pick and coming off an injury, but should be cheap and has starter potential.
Chris Thompson - Could cost us a comp pick and has durability issues, but is a phenomenal pass catcher.
Trade
Giovani Bernard - Might be able to be had fairly cheap coming off a not so great season. Versatile HB.
Tevin Coleman - With Mostert's breakout, Coleman seems unneeded, but it would mean trading with the 49ers.
Kareem Hunt - Unless the Browns are giving him away, I'd shy away. But if the price is reasonable, it's worth kicking the tires.
Draft
Zack Moss - I'd compare him to Kareem Hunt. 4.6 40 but breaks tackles like crazy, great pass catcher and pass blocker, and good instincts as a runner. Tough as nails.
Eno Benjamin - Human joystick and a major weapon as a pass catcher. Will juke you out of your shoes but also won't hesitate to run you over. I'd compare him to Austin Ekeler.
Ke'Shawn Vaughn - Explosive runner with power and contact balance. Really good fit in the outside-zone. Has speed to the corner and an effective one-cut runner. Decent ability in the passing game too. I'd compare him to Lamar Miller.