In my perfect scnario, I'd take Gruden as HC with Bevell as OC and Zimmer as DC.
I cannot decide between Gruden, Bevell and Wisenhunt. I'd like to see Wisenhunt bring in Russ Grimm, but bringing in Bevell is intriguing and I love the idea of taking one of Seattle's coaches away from them. I'm just not sure if he's ready to make the leap from OC to HC. If we could get him as an OC, that would be great but I highly doubt he'd make a parallel career move and leave Seattle without a promotion.
McDermott would be a good choice too. I really think it all hinges on what assistants will be joining the new coach, especially the defensive coordinator.