David W:
My good man -- I'll take the bait and say I can make a helluva case with two other states -- Pennsy and the Garden State.
I would not automatically ascribe "bulletproof" status to all of the Buckeye courses you listed as top 100 guarantees. I often wonder just how much architectural heft there is with Double Eagle (great conditioning no doubt); Scioto is a mixed bag of different architectural influences; and Canterbury, while unique in certain ways, is really not in the same league as The Golf Club, Inverness, MV and Camargo, IMHO.
Pennsy would have a fine listing with the likes of --
Merion / East
Oakmont
Huntington Valley
Lancaster
Rolling Green
Phillie CC
Lehigh or Fox Chapel
Aronimink (I'm assuming the new version since I only played the former layout before the work of Prichard)
The Garden State would have solid representation with the likes of --
Pine Valley
Plainfield
Baltusrol / Lower
Galloway National
Somerset Hills
Essex County or Balturol / Upper ... other worthy candidates
Hollywood / Ridgewood E&W / Forsgate Banks Course or Montclair #2 & #4, Hidden Creek, Metedeconk National, etc, etc.
David, I don't doubt you're going to throw back the argument that Pennsy and the Garden State are too top heavy with the likes of Merion / Oakmont from the Keystone State and PV and Plainfield coming from Jersey. Nonetheless, the depth of courses in my home state and my neighbor to the west are quite solid and often a number of the courses I listed receive little, if any, real fanfare from those outside the immediate area.
Like I said my friend -- the Buckeye State would have a battle for the 3rd position.
P.S. I do concede without hesitation that The Golf Club is one of the ten best courses I've played in the USA and with that the finest Pete Dye course I've played.