J. Landry and Odell are true slot WR
Landry is a great fit anywhere you line him up, but he'd certainly be a great slot receiver. OBJ is NOT a slot receiver; he is too chary of contact. He has good speed, though, and his leaping ability makes him play a couple of inches taller. He has elite quickness, too.
Both OBJ and Landry are head-and-shoulders better than Avery Peterson. AP looks terrible in the clips posted above, but in fairness to him, the QB is too awful to really evaluate AP. I don't know about Dural, but I've heard good things, and presumably, he knows the playbook. The Holy Cross kid looked elite from the clip I saw. If you want to focus on a new guy at wideout, that's your best bet IMO. He looked extremely athletic and - strangely, considering he's only played two years - he looked college-ready. Of course, he had a good QB.