trading back and grabbing Biadsaz wouldn't be a terrible idea. Get a Center who can play with Allen for years.
https://www.profootballfocus.com/news/draft-bosa-goes-first-renners-first-2019-mock
totally agree. if they can't trade down, I have no problem with DL, or Josh Allen (LB)
Greedy may be BPA where we draft. If that's the case, I would expect the Bills to be getting a lot of calls--teams like Steelers, etc., esp. if Levi Wallace keeps playing well. But if there is no value in the trade, I'd get Greedy at CB and draft Greedy.