To me, apart from this, the most elegant bombers ever built were the A-26 Invader (and B-26K On-Mark Counter-Invader as well), the B-17, the Petlyakov Pe-2, the Mitsubishi G4M Hamaki (Betty) and some more that now I probably cannot remember... I also love WWII Japanese recc planes such as the Mitsubishi Ki-46-Ia/III Dinah.
one of my favorite bombers ^^