Though, on many I agree with you, I only like one in your top four. First, the P61 was a night fighter, no? ( I may be wrong on this) Second, the Catalina was a floatplane, I dont think we can have floatplanes, do to the way water is modeled (it isnt). I dont know the numbers off the top of my head, but it was an anti shipping boatplane, no? Chances are it has a light bombload and low top speed making it useless in AH (just like the JU200 Condor that is so often suggested). We definately need the He111 though. And the P-39 (this almost won the vote, lost to B25 which is now in development) . An Me 410 would be pretty cool too, I know it at least has a small following. (the 410 was designed after the company's name was changed from Bayer Fleugzeugwerke (sorry if I butchered that) to Messershmitt, so it has the Me designation. The 109 and 110 were before that, thus the Bf Designation.) Never heard Pe-3, but I do want a Tu-2, which would be faster, carry a heavier bombload, but have a slightly less favorable defensive armament to the B-26.
Edit: on the PBY, a trip to Wiki got me:
Performance
Maximum speed: 196 mph (314 km/h)
Cruise speed: 125 mph (201 km/h)
Range: 2,520 mi (4,030 km)
Service ceiling: 15,800 ft (4,000 m)
Rate of climb: 1,000 ft/min (5.1 m/s)
Wing loading: 25.3 lb/ft² (123.6 kg/m²)
Power/mass: 0.034 hp/lb (0.056 kW/kg)
Lift-to-drag ratio: 11.9
Armament
3× .30 cal (7.62 mm) machine guns (two in nose turret, one in ventral hatch at tail)
2× .50 cal (12.7 mm) machine guns (one in each waist blister)
4,000 lb (1,814 kg) of bombs or depth charges, torpedo racks were also available
Its easily outclassed by what we have and wouldnt see any use. Gonna look up the P-61 now.