Welcome to the board. I think what you suggest might be possible, though I really hope Geno is there and they pull the trigger. I do caution against the notion of a "sure thing" around these parts. Sure things can end up being guys like Mike Williams, too.
The sure things available at this point appear to be the offensive linemen. This is one area where the Bills seem to have done well picking from the waiver wire and under-the-radar free agents, but they do need guards now (a situation of their own making). Warmack will probably be there and I hate the idea of drafting a guard so early to replace a very good guard that they groomed and just let leave. That said, it does line up. If one of the top tackles falls to them, I'm sure they have to consider that, too. Who else strikes you as a sure thing worthy of #8, though? Maybe Milliner, in which case, get prepared for the apoplectic on this board