Trade Advice, Help My Team Please!

So I’ve been back and forth about who I should trade for for running back help. My team is below. I have a lot of wide receivers and not so solid at RB. Who should I try to aim for Bell, Mack, chubb, Barkley, Kerryon, Conner!? Each of those teams that have those players have 1 solid WR but their number 2 is a a lower level WR… what kind of package do you think would be best to interest for one of those type players? Standard scoring*

Thanks in advance for all suggestions and help!!

Side note Barkley/Conner owner has
Wr: Landry, Dede, James Washington

Bell owner:
Julio, Sutton, Ridley, Godwin, dk

Chubb owner:
HOPKINS, Allen, Godwin, Anderson, Ross.

Kerryon owner:
Obj, Cobb, Hilton, Kirk

Mack owner:
Jeffery, Thielen, Edelman, djax, larry