I think Lamb would really help out Darnold's development, especially as a complementary piece to Robby if he sticks around
Having any good wr across from Robby would help, but I dont think that is Lamb. Sam would benefit most from a 6'4 reciever who can make plays over the middle and in the end zone. With his excellent accuracy and mobility someone who can box out and jump over recievers would be perfect for Sam. Sam made Terrelle Pryor look like a pro-bowler in a couple of those games, imagine what he could do with a guy like justin jefferson