Marty Feldman (heard of him?): ugly but a unique examplar of raffish-zany-cool-grotesque. But surely no uglier than the purportedly sexy Serge Gainsbourg - but then the French are funny like that.
Didn't hold him back too much, however:
In 1959 he married the love of his life, a dolly bird named Lauretta Sullivan. They lived for many years in a gothic creepy Victorian pile in Hampstead.