Thee Template
might work.... if people respected the frontal elevation. A unitary half-circular arc. Nobody got time for that. Plymouth[?] made a concept roadster with a half-circular windshield header [citation needed, I know] and they found it messes with the passenger's head room.
I started a thread
Why does The Template have to be a half body of revolution? in 2012[!] to address it's problems.
Another counterexample is the GM EV1. It has a too-fast fastback and too-good numbers.