Am I undervaluing David Johnson

I’m looking to trade away David Johnson for WR depth but can’t get an RB needy teams to bite. A few offers I have floating around from different teams are to receive Chark or Pittman. I feel like sending David Johnson for just one of them is an overpayment, but I’ll probably never use him with his upcoming schedule. Should I make one of those moves with my current roster?

RBs - Carson, Hyde, Clyde, Gibson, Dobbins, Jamaal Williams
WRs - Moore, Diontae, Mike Williams, Deebo