Patrick: most of courses you mentioned - Morris County, Essex County, Forsgate, and Westhampton have been maintained “properly” over the years and as a result, obviously, many green features are not as sharp as they originally were.
Ron Prichard did Morris County over a few years ago but I’m not sure if he did any or all greens over.
At Essex County the greens are not very undulating in many cases and may never have been, but there are a quite a few greens there that are original, especially the short uphill punchbowl 14th, the Tillie 6th green, the great 2nd green, which I think is the most interesting on the course, and the D P 16th green, and even most of the short 9th, although we added about 15 more feet in front when we reestablished the cavernous bunker in front because the Tillie green is too shallow for the tee shot.
I think many of Forsgate greens are original and there are any number of greens at Westhampton that are as well (some of Raynor’s best).
There are 2 very interesting greens out on Long Island where there are original, and very interesting, single greens built on non-Raynor, Banks or Macdonald courses; the 2nd hole over water at North Hempsted built by Banks and the Eden Hole (#5) at Nassau CC built by Raynor whose surfaces rival the stronger greens at NGLA.
I’ve been guarding the Knolls greens for years. Somewhat thankfully no surfaces have been altered in any way and for many years no topdressing of the greens was done - money issues adn disinterest, the culprits. In my opinion they are more “Charles Banks-textbook” greens at the Knoll than textbook Macdonald greens at National.
In all there are really a lot of pretty original greens of theirs around - selectively located on various courses.