I missed this thread a few days ago, I feel like I have to reply as a Ross fan. Upstate New York is a particularly good place for Ross courses, and my top five favorites of his would go as such:
Oak Hill West - 17 original Ross greens, beautiful land for golf, an unbeatable walking layout.
Oak Hill East - the Fazios destroyed some Ross classics, but most of the routing and 14 great Ross greensites remain. An unrelenting test.
Country Club of Buffalo - This course is a different style from Ross' other Upstate New York layouts, mostly because of the quarry that slices through the property. The bunkering is shallower than his normal Northeastern style. However, there are some great greens (5, 6, 10, 13, 14, 18), the Quarry holes are completely unique, and the par threes are as varied and diverse as you could ever want.
Teugega - my favorite set of Ross greens behind Oak Hill West. The fan-shaped routing is tremendous as usual. The course could lose some trees.
Monroe - great, swooping terrain that falls over unusually sandy soil. The best holes are fantastic, such as the brilliant stretch from the 4th to the 9th. However, the course possesses a few weak holes and three non-original greens that are an abomination. Hanse's work here was very good.
Country Club of Rochester is also fantastic as mentioned above. Gil Hanse did a very good job with the restoration a few years ago. However, while Hanse did a great job restoring the features on the existing Ross holes, there are only 13 original Ross greens remaining in the layout. Holes 5-7 are not Ross and very poor holes overall. Number 2 is a very neat short par five, but the green was reconstructed by Arthur hills and is very artificial. Number 18 was rebuilt by Hills, then bulldozed and moved back towards the clubhouse by Hanse in the spring of 2008. This is not the original greensite, and the new green has not been well-received. Nevertheless, CCR is an excellent layout with several great Ross holes. The long fours at 8, 9, 12, and 13 are particularly good.