I honestly never saw anyone mention Taggart as an option, that I can remember.
A few folks mentioned Frost, but mostly acknowledging that he was probably going to Nebraska.
A few more mentioned Kelly, but I never got the impression that many were serious about him.
The big names on this board (each with at least as many detractors as proponents) were Gruden, Mullen, Miles, Kiffin, and--once Currie started talking to him--Leach.
Kelly would be a distant 6th behind those, with Frost even further in the background. Taggart non-existent.
That's how I recall it, anyway.