Coach K and Rudy T seemed less scary possibilities given what the Maloofs were looking for.
Nellie, George Karl, Larry Brown (after he gets fired) were the scarier options. Wilkens is just way past his prime. Silas was always mediocre.
Carlesimo, Collins and fellow screamers would be an utter disaster waiting to happen. Carlisle is a great coach who might become available, but cannot work with Ron. Jeff Van Gundy is similar to Carlisle in many ways, and Ron would likely revolt.
Terry Porter et al. would be nice, solid, but lacking the splash I think the Maloofs want to make.
I think Elie might make a good coach in the league, but again, would have to fight not being a sexy choice.