#17 at Eagle Eye in Michigan was intended to be an exact replica of TPC. In fact, the undulations and bunker are indeed the same, I recognized my own shot while watching the Players.
#9 at Stonelick Hills in Cincinnati is a par-5 with island green. It is reachable for long hitters, but would be tough to hold, though it is very large, because the green is two tiered with the lower tier in the back. Fun hole.
The Briar Patch in WV has a long par-4, #18, with a large island green that is tough as nails.
Those are the only island greens I have played. Fun idea. And I am admittedly clueless about 'flow', so I cannot say how they 'fit' the rest of these courses.
Doug