I don't want Wentz traded, but I'll play along.
If you're going to trade a potential franchise QB for #1 and #4, then you have to take a QB with #1. I guess if you had 3 of Rosen, Darnold, Mayfield, and Allen rated equally, then you could take someone different at #1. But if that's the case, then I'd trade out of #1 as a RB simply isn't worth the 1st overall pick (even if he does seem like a great player). QB is just so much more important of a position and you have multiple teams stumbling over themselves to trade up and get one.
If I were to make that trade with Cleveland, then I would turn around and shop the #1 pick to the Bills. Starting with #12, a 2nd this year, and a 1st next year. I'd take Barkley or Chubb at #4 (or even Minkah, but he seems to be slipping in some rankings... bad combine?). If Mayfield or Lamar Jackson are on the board at #12, then I take one of them. Otherwise, I look to extend Foles.
Then go with LB/S/WR/TE with picks #35, #53, and #64 (pick #65 that was in the proposed trade is now property of the Bill from the Tyrod trade).
Seems like a good way to make another playoff run next year and then hopefully roll with a new potential franchise QB in 2019 and plenty of talent around him.