Its hard to say Juzz.
The P51H and P47J would be fastest at really high alts and would be flown like the current P51D.
The Do335 would be as fast and faster under than both of them up to around 25k. Im not sure what its manuverabilty is like but it does have pretty big and broad wing. So it could be the "Dora" to the P51H/P47J. A little faster under a certain alt but maybe less manuverable.
The Spit21/22 would be much like the SpitIX in here. Somewhat slower than the top speeders but much more manuverable and easier to kill in.
The Spiteful never weorked right.
The Fury and TempestII, and MB5 would be like the Chog, big tough, generally manuverable, and reasonably fast with good dive and lots of hispano ammo.
The F8F would be the Yak of the bunch. A lttle slower than the monster top speeders and not exactly a dedicated turner, an experts plane.
The Me109K14 would be very much optdated and hard to fly well in this setup. It would probably do around 470mph or more at alt and climb much better at all alts owing to the DB605L engine and the 4 bladed prop. It would have 3 30mm cannon, but I cant imagine how its handling would be with all that weight and extra speed. Though it was to have numerous aerodynamic improvements so maybe they fixed this. BTW the K series had improved ailerons which really helped high speed roll.
The Ta152C would be the FW190A8 of this group. Its speed isnt that remarkable at about 450mph or so, its climb isnt that great and its very heavy so its turn is poor but rolls well. However it could mount up to SEVEN 20mm and or 30mm cannon, with some of those likely being MG213 20mm high velocity 1000rpm rotary cannon.
P82 would really be a faster P38, a big target as well.
Im not sure who would win but I suppose the Spit21/22 followed by Tempest/Fury/MB5, then P51H group would be on the top for use in a "1946 Arena".