Trade Help Needed

At RB I currently have Demarco Murray, Todd Gurley, Isaiah Crowell, Mike GIllislee, and Doug Martin once he’s back.

At WR I currently have Antonio Brown, Demaryius Thomas, and Terrelle Pryor.

I’m wanting to unload some of my RB depth to get either a top tier RB or WR. Who should I give up and who should I target?

Standard scoring league.