FM-2 (can outturn virtually anything, including zekes)
P-40E (won't compress, turns well with flaps)
P-51B (folks underestimate the 4 .50cals)
Spitfire Mk. I (folks really underestimate the 8 .303's)
Spitfire Mk. V (not much ammo or fuel, but turns well)
Spitfire Mk. IX (good blend of ammo, fuel, and turning)
Hurricane Mk. I (will outturn anything, no joke, also, same guns as spit1)
Hurricane Mk. IIC (tight turner, barely any ammo, but 4x 20mm's works)
P-38J (turns well with flaps, watch out for compression)
P-47D-11 (tons of ammo, turns well with flaps, dives like no other)
P-47D-25 (same, just more fuel)
Bf-109F-4 (turns good, moderate ammo)
Bf-109G-2 (very good in the vertical)
Bf-109G-6 (heavy armament, good for bomber-hunting)
Bf-109G-14 (has the spud-gun option, fast)
F-4U-1 (turns well with flaps, gear can extend at 350mph or so)
F-4U-1D (fast, turns well with flap control, can go in heavy)
Yak-9T (37mm cannon makes short work of bombers, turns on a dime)
Yak-9U (must keep ammo conservation at the top, turns very well)
SBD-5 (with the flaps full out, can outturn anything save hurrimk1)
I think that about covers it....all my opinions, of course.