Interesting suggestions and some very frequent suggestions. THe A10 is sexy?? I'm worried!
But aside from the obvious like P51D, Me262, plus various current military heavy metal, what about the DH88 Comet or its cousin, the DH Mosquito? Also Lockheed P2 - there's long, slender, graceful, especially with the MAD tail. Of course the Spitfire, but I prefer the Mk IX rather than any of the later Griffon engined variants. It looks much more delicate, less brutish. The Hawker Hunter - lots of curves. And of course there's the other Lightning - made by English Electric. Performance ++++ including supercruise. "Its got two engines, one on top of the other. But the top one is a bit further back so the pilot has somewhere to sit."
Haven't worked out how to post pictures so I can't add any here.
Chris