The Fokker D.VIII is my personal favorite, although the D.VII is right up there. The D.VIII, though, has the speed and relative stability of the D.VII, it has the maneuverability of the DR.I, and it has the aerodynamic body of a racing plane. It was the perfect combination. Pity they weren't introduced earlier. Germany would have owned all other nations royally in the air war.
Here's a picture of the great Erich Loewenhardt testing out a D.VIII. He shot down two Sopwith Camels in a single day with it, but he was never given one officially:
This is probably my favorite picture of him, just because of his yellow DR.I behind him:
Of course, there's also Werner Voss' photos with his DR.I:
