Ever since i switched my name, been gearing for perks flying the most unusal aircraft. Some ask why i go crazy getting perks its quite simple: I can fly entire tour on one aircraft and not worry bout perks running low.
Anyhow some non-typical aircraft ive been flying and had real success:
Mossy, P-40, Me-109g6, P-47-D40, Spit-5
Most these planes are flown VERY rarely dispite what people say, D40 is mostly used for ground attack, I prefer it over P47N because of the 5 eny.
If you wanta build perks quick and have a great high eny bird to do it, learn those planes.