What do you think?
the 190 is actually a great dog fighter. Not many people know how to really work it to its full ability.
Yak 3 is a close fifth place.
For the average player, a combination of speed and firepower and platform stability/good handling makes the best 'crutch'
The fast, big-gun planes will keep you alive, but (other than plucking the unwary as you zoom through a furball) won't help you win a fight as much as the dancers will.
If we're talking crutch as in "easy mode training wheels" my vote goes to the Spit 16 and N1k. You can intentionally screw up in that plane and still be ok.If we're talking crutch as in "easy to survive in" then the Tempest, La7, 190D or P-51D. Just go really fast and no one can ever catch you.