Not Spaatz, but a good guess. Here's another clue and an amendment to clue 2::
Looking for a pilot.
1. Joined the military in peacetime.
2. Fighter pilot with some kills (according to one source; others don't mention these), but not an ace.
3. Best known (apart from future old-person clue yet to come) for wartime aviation operations other than air-to-air combat.
4. Known for aggressiveness, independence, and a willingness to try unorthodox methods.