Engram Trade Talk

I have a league mate trying to trade for Evan Engram. I already have Mark Andrews so I think he has the higher upside with the percentage of targets from Lamar. I was thinking of the following:
I get Darren Waller and Devonta Freeman and he gets Evan Engram and Miles Sanders.
I think Freeman still has upside being an RB1 but how much upside with his offensive line?
I have saquon, kerryon and montgomery but would want some more solid RB depth.