In the 'just too late' scenario : DeHavilland Hornet (just go and read the performance figures and what Cpt. Eric Brown had to say about this plane).
In the 'actual combat at large scale' scenario : P-51B (because that's what I'd choose in AH).
The P-38K and P-72 (Did that ever fly???), P-51H, F8F, SeaFury. Tempest late versions, Martin Baker MB5, Supermarine Spiteful, La-9 & 11 all would be great though. But what would be be the best?