A-26
Beaufighter
G.55
G4M2
He-111
Ki-43
Me-410
P-61
PBY-5A
Pe-2
Yak-3
Gosh, this is really hard.... [edit]most of [/edit]those planes are badly needed... and one of them I want for clear personal reasons. Anyway, I think there's some big gap in the current planeset even for country well represented, one in particular, that screams for vengeance, so (given that my personal favourite is doing good by itself), I'll vote for
He-111 (it really amazes me that it's never been added in all these years!)
Second one is really more difficult, japanese and russians would both need G4M2 and Pe-2 for the same reasons, and we'd need ki-43, too..... being more of a fighter guy and having already voted for a bomber, I'd say
Ki-43