At this moment, with no other information.
1. Narduzzi
2. Clawson
3. Lembo
4. TJ
I wouldn't accept any of the others. I think Clawson/Lembo are interchangable, but I picked Clawson. The idea that he was fired by Kiffin can only be a plus, and I like that he whipped a clearly more talented NIU team, something Lembo hasn't been able to do, though Lembo's body of work is better as he beat a lot of teams that PP just couldn't. As for TJ, I think he could beat out either Clawson or Lembo based on an interview, but I think Narduzzi's resume is tough to overcome if he wants the job and WM likes him. So long as TJ wins the job on merit, I don't have a problem with it, unless WM is planning to bolt somewhere himself. WM would be putting is own neck on the line earlier with TJ than with the others. An improvement next years is certain, right? So, the referendum on TJ comes in 2015 whereas, if comes in 2016 for anyone else. It's safer for WM to pick someone else.
I am also inclined to slot a mystery coach somewhere within these four, probably in line with Lembo. I am sure there are more than these four under serious consideration.