Trade for Johnson or Cook?

Idk who I should trade for Kerryon Johnson or Dalvin Cook to upgrade my RBs
My current RBs are Kamara Hyde Lynch Lewis AP and Foreman
For Cook I was looking to trade an RB and WR but don’t know who to choose that would make sense
My WRs are Adams Gordon Ridley Edelman and Coutee
The Johnson owner does not have many WRs and was interested in Edelman earlier in the season but idk if it’s worth it?
Which RB would u go after and who would u offer? Thanks for the help FFBallers!