Well if you want "ugly" you surely have to include the exceptional efforts put in by Blackburn to include almost everything they ever made. Whether it be the Blackburd:
Or the Blackburn Blackburn (so fugly they named it twice):
Or the beast that dare not speak its name, the YAy/YA8/YB1 ASW offering (clearly intended to save ammunition by scaring Russian subs back to Kola):
I suggest while other individual aircraft might win on points, Blackburn obviously deserve a Lifetime Achievement Award and Fellowship of the Order of Quasimodo in recognition of their dedicated contribution to fugliness in aviation.
PDR