Concerning the current WT cemetery at Wallkill, the burials are accessible online:
https://www.findagrave.com/cemetery/2403939/memorial-search?page=1#sr-86507218
Rutherford is not listed there, I don't think this graveyard existed in the '40's. The oldest burial I see is AH MacMillan in '66. Curiously, there are entries for a number of people who haven't died yet, maybe they have gravestones there in advance for some reason. Hmmm.
There have been threads on this site before about Rutherford's burial. If I remember correctly, they wanted to bury him at Beth Shan or Beth Sarim, but the zoning authorities wouldn't allow it. Where he ended up I don't know, but other websites suggest the WT had a cemetery on Staten Island where he was buried.