The B-17 is the ONLY BUFF I will up. B-24 has a slightly bigger bomb load w/1000lb bombs, but burns like a tiki torch when you say the WORD "fighters". The Lanc has a great bomb load but pea shooters for guns with a rediculously low level of ammo and it climbs like locomotive.
Flying Fortresses will deliver the bomb load and get you home most of the time, (That is unless Lusche is in the area).

Also it is the only Boeing airplane in the game and I was born in Seattle... My uncle built B-17s, B-29/50s, B-47s and B52s.