Also, the list is missing the Nieuport 24 and 28.
Nieuport 24 was just an upgraded 17, so they probably didn't think it deserved its own entry. And the N.28 is the fighter everyone tries to forget- the USAC only had it because the French rejected it for service, and the Americans stopped using them as soon as they could find enough SPADs to replace them in the line squadrons. It's the Buffalo of WWI (at least the US version of the Buffalo).
AFAIK, Douglas Campbell was the only one you could really call an "N.28 Ace", many others got their starts on it but scored the bulk of their kills with SPAD XIIIs.