Nieuport series was also an important aircraft to many smaller Allied air forces (ie.- Belgium, Rumania, Russia, etc.), as was the SPAD. Most successful in French hands, but by no means French exclusively.
And I'm torn over which to hope for first personally, the Albatros D.II or the Nieuport 28C. Both are drool worthy IMO.
We should start out with Eindeckers and Avro 504s though.