Where did I get the list?
Since it apparently isn't obvious, the list I have is:
1. Richard I. Bong, P-38 pilot, 40 kills
2. Thomas McGuire, P-38 pilot, 38 kills
3. David McCampbell, F6F pilot, 34 kills
4. George Preddy, P-47 pilot, 29 kills
5/6. Gregory Boyington, F4U pilot. 28 kills
6/5. Francis Gabreski, P-47 pilot, 28 kills
7/8. Robert Johnson, P-47 pilot, 27 kills
8/7. Charles McDonald, P-38 pilot, 27 kills
9. Joe Foss, F4F pilot, 26 kills
10/11. Robert Hanson, F4U pilot, 25 kills
11/10. John Meyer, P-47 and P-51 pilot. 25 kills.
Above I simply stopped with Robert Hanson. This is the list that was "official" a bit after WWII and includes USAAF, USN, and USMC all together. I am not a subscriber to all the revisionist filtering that went on over the years. It was mostly done by people trying to advance the careers of certain aces, and they seem to have convinced some people of same. I'm not in that group.
Three P-38 aces, three P-47 aces, two Corsair aces, and one Wildcat ace.
This is U.S. list, not an "Allied list," though I have that as well along with list for all countries except the smallest five (and I'm working on them as I get the time and desire). The P-38 was a U.S. fighter in origin and most of the production run, so I stuck with US pilots.
I'd be happy to participate in an "Allied Ace" discussion, it has merit and there are a lot of good pilots out there from all sides, but the merits of the P-38 were almost a U.S. - only concern. The only P-38 that was of real concern to the British was the awful units they ordered with non-contra-rotating props and non-turbo, too (lots of torque issues along with critical engine issues and generally unfriendly performance). None of the rest of the P-38's were so afflicted.
And Bill, US citizens flying the RAF are not counted as U.S.A. by me. They are counted as RAF since that's the service they were flying for when the victories were achieved. If you disagree, then do so in good health. I'll maintain my point of view either way.