If it's leadership you're after rather than exceptional airmanship, many of the main WW2 examples are obvious, but people like Leonard Cheshire, Johnny Johnson, Douglas Bader, Bob Tuck and Adolf Galland will have been done many times. My favourite of this bunch is Alan Deere, but I wouldn't argue against any of them. Gus Walker would be a good choice too. If you want someone higher up the tree, there's Dowding, or if you go back to WW1 you can't go far wrong with McCudden, Boelke or Mannock. Pre WW1 you've got Louis Strange, or Trenchard of course
If the emphasis is on airmanship rather than leadership, the field opens up to include pilots like Cunningham, Beamont and Duke, and maybe some mavericks and eccentrics, like Albert Ball and Don Bennett
Choosing from that lot is quite a nice problem to have!