I'm going for a BE2 of one or two sorts.
Ticks all the boxes. 2 seater, not kitted very often, TVAL have some. Plenty of variants can be created with clever sprue arrangement, which WNW are famous for.
Lost of exciting marking options as it served all over the place through most of the war, and before in a few roles - including Leefe-Robinson's airship killer.
TVAL have had a couple for a while, plenty of time to make a kit from them.
The Hanriot is relatively new acquisition. Nobody needs a DR.I or a Camel.
Rob