I think you have to put RWilliams second on the list, simply because of his success in the tournament (just as K moved up high, after his run from 86-94), and also because Williams has either the highest or one of the highest winning percentages of all coaches, all time, coaching only in top conferences. GWilliams can't compare, if for no other reason than his tournament success is far inferior. Also, a big part of coaching is recruiting, and RWilliams does that as well or better than anyone. For those who don't think Roy motivates well, I would say, look at how hard UNC competes against Duke (even when inferior-- see their victory over Duke at Duke in Hansborough's freshman year, that by all rights, never should have happened, when one compares the talent).
I also think you have Bennett far too high (he perhaps shouldn't even be ranked yet, at this stage of his limited career), and Hewitt deserves a higher ranking, because of what he has already done at GT (and Siena).
I'd put Lowe at the bottom of the list, behind Gaudio, because of his lack of success (to this point) in recruiting, where Gaudio has at least outdone him there, so far.
I'd probably go:
1)K
2)Roy
3)Gary
4)Hewitt
5)Hamilton/Skinner
7)Greenberg/Pernell/Haith
10)Gaudio
11) Lowe
TBD- Bennett