The talk, though VT doesn't have many reliable message board insiders as some other programs out there, is the most realistic candidates are
Billy Napier
Jamey Chadwell
Charles Huff
Dave Clawson
Tony Elliott
A lot of insiders thought Elliott was the guy last year but for whatever reason (and none of them know why), our AD pussied out on firing Fuente at the last minute. There's been some smoke from national level writers indicating that Napier might have interest in the job and FWIW, Napier is coming to VA for a game vs Liberty this week so firing Fuente now clears the way for an open interview while he's in state. I'd love Napier but he's gonna have a ton of competition for him. If LSU strikes out on its bigger targets, for sure Napier would accept them in offered. And TCU can likely provide more money resource wise.
Fickle doesn't seem realistic and should have better options out there. No clue about Campbell. His name hasn't been mentioned much at all.