Brian:
Holston Hills is way up there on the Ross list. Certainly it deserves a good deal of acclaim.
I have played all of those you have listed and around 230 others. It is impossible for me to say which one is best and tough for anyone to say until they see Seminole, Linville, Sedgefield, Charlotte, Plainfield, Gulph Mills, Aronimink, Wannamoisett, Misquamicut, Salem, Essex County, Longmeadow, The Orchards, Youngstown, Acacia, The Broadmoor in Indy, Beverly, Minikahda, White Bear Yacht Club, etc. The truth is I am not certain I have named the best.
My favorite Ross course is the one I am playing today, but might be replaced by the one I am playing tommorrow (theoretically).
I see I have left out the Ross courses in Rochester, NY and one of my personal favorites Teugega in Rome NY.
If I was told I could only play Holston Hills the rest of my life, I would not be all that unhappy.