Alfa Romeo Giulietta Spider – 1955
Alfa Romeo Giulietta Sprint – 1954
Volkswagen Golf I – 1974
Citroën CX – 1974
Alfa Romeo 156 – 1997
Bugatti Type 35 – 1924
Aston Martin V8 Vantage – 2005
MG B – 1962
Ferrari 250 LM – 1963
Honda Civic CRX I – 1983

To put things in perspective, this list could have easily existed just out of Alfa Romeos. And to give even more perspective, one of the most ugly cars ever (“how to screw a great design, lesson 1”) is the Golf II (1983) (in my humble opinion, that is, of course ). Also I tend to have a lot more respect for designers who have to consider practical stuff and a tight price-tag, instead of just making a fast car with hardly a price limit at all. So my runner up is the Fiat Panda Mark I & II (1980).