Bf 109E, F, G-2, G-6.
E-4, no. F-4, G-2, G-6 yes. E-4 is too slow and too hard to be successful in. The other three are all top dogs for perk farming.
P-40 E,F,N
No, P-40s are all too hard to be successful in to keep up the K/T. A6M2 and A6M3 would be better, but they are also too slow.
Yak-9M (Yak-9T w/ 20mm)
Not too bad, but it is slower than you really want in a perk farmer.
La-5FN
Another top dog for perk farming.
Ki-61 is also a very decent fighter, just a bit lacking in top-end speed.
Yup, pretty much the same place as the Yak-9M/T.
For bombers
He-111 (when used smartly)
No, OBJ is too high, it is too slow in climb and speed and it is too vulnerable.
Boston III
It is ok, but the range is too short to really be great and it is excessively vulnerable.
Ju-88
No, OBJ is too high and it is too vulnerable.
G4M
About the same as the Boston, trading the range weakness with being slow.
For bombers the Ki-67 stands head and shoulders above any other for perk farming due to its combination of speed, range, decent guns and high OBJ.