Outside the 25 year scope, but I nominate the Ford Fiesta, at least as sold in the US in the late 70s.
Sorry, LOVED my Fiesta. It may have been a flop because it was only sold here for 3 years or so, but it is still sold worldwide, 30 years later. It was a bit ...minimalist (i.e., I had to buy the glovebox kit with a door), but it had personality and got me where I wanted.