[ProudVet77]

I'd have to add the Me-262. While primative, it was a long way ahead of any other plane of it's time. We're lucky Hitler prefered bombers and not fighters otherwise it would have been in production and combat worthy a year sooner.
It would be like a mach 3+ fighter suddenly appearing now.

[Oztrich Boy]

I'd have to add the Me-262.

Not really. While slower, the RAF's Gloster Meteor with that big broad chord wing would have taken the Me-262 in a close-in knife fight.

And at longer ranges the Me-262's big bomber destroying 30mm cannon with really low MV and RPM wouldn't land a round on a manouvering target. Dead meat to the Meteor's high velocity 20mm's