Nope, for true ugliness, you have to go to early 1930s France; the guys designing bombers then had a true genius for complete and utter violation of anything resembling aesthetics, and the pinnacle (?) of their creations was the Amiot 143. That thing is horrible to look at. Streamlining? What's that? Even biplane airliners have more appeal.
More recently, Boring... er, Boeing came close with the Flying Hot Dog, aka the 747DCF or whatever it was called and the worst-looking jet aircraft ever, the X-32 Basking Shark. Thank Finagle that thing lost out to the X-35; the thought of hundreds of those things flying around is enough to put one off flying for good (and eating!). I remember seeing the mock-up at Farnborough, and I was amazed that they dared to try and build something so appalling-looking, much less sell it. Yuk! is the only word than can even begin to adequately express my reaction.
I would disagree that the 787 is ugly; it's just boring! Designing for ultra-efficiency may be commercially viable and technically challenging, but its results are just plain dull -- but then, airliner design has been locked in a spiral dive towards the aeronautical equivalent of "little boxes, all made out of ticky-tacky" since the 757 and 767 appeared.
Gravity is a downer... so let's go flying!