Best Aesthetic Vintage Black Receiver or Tuner

That's easy - a Yamaha T-2.

Far more beautiful than any of the candidates mentioned above, in my opinion.

Also, it is an excellent tuner.

Difficult to find in perfect shape, however, and the aluminum case is easily clouded or scuffed.

Good luck.

Yes, the T-2 is a beauty! A classic.

The T-2 is even better looking in silver ;-)

Magnum Dynalab 208

Yogiboy, LOL! Man, that brings back a painful memory...
Back when Lynn Swan made one of his amazing athletic catches with the Steelers - can't remember what game - I was visiting my grandparents who had a porch with a railing on a short but steep sloped hill out front.

I was so pumped by Swann's catch that I rushed outside to imitate him. Standing before the railing and slope I called out to the world, "LYNN SWANN," and leaped over the railing intending to land on the hillside.

I almost did it, but my back toe caught the top of the railing, throwing me off balance. I landed on one foot on the downside slope and severely rolled my ankle! OOOOWWWW!
One of the most painful moments of idiocity in my life! I hobbled around for days and days.

But Swann's catch was magnificent! :)

Regarding audio receivers, I had a really cool black Sansui receiver with "tab" buttons having orange illuminated highlights, which I wish many times I still had. Sansui is not a bad option for nostalgia receiver.