Matt:
My records indicate the same as Tom MacWood. I have played the course many times, I live 40 minutes away and know the superintendent well. He holds most of the historical records to the course and while there are Buffalo News articles from the very early 1900's stating that Ross walked the property, there is no indication that he designed anything for the club. There is, however, solid evidence that Willie Watson, as Tom says, did major design work...to the effect that he is credited for the design in several documents.
FYI, I have a 1927 aerial photo of the course at good resolution and the design features are very interesting. The course you played looks nothing like the course from 1927. The routing is the same, but the bunkering scheme and the old square and triangular shaped greens are very old school and restoring many would really bring out some interesting play.
As you may know, there are similarities between some of the old guard architects such as false fronts and strategic/interesting internal contours in their putting surfaces, so without seeing the old photos and really studying the course history/evolution even the best can be fooled.