Who, do you think, designs the best looking tube-based devices?

Border Patrol, but I am biased since my amp is a Border Patrol  SE300b

When I was looking, Pathos (Italia!) and Vincent (demure, but with a peek inside the boudoir) were both alluring, but in the end I went with Quicksilver, but not for looks. As I look over the variations, there are lots of nice boxes (some with tubes jutting out, others with fancy metal coffins), but they all reduce of a pedestrian, utilitarian look, at least to me. Yes, a nice wood box doesn't hurt, but from a design standpoint, it's not much of an aesthetic accomplishment. Electronluv is amazing -- almost dangerously good looking. 

Marantz 2
Shindo Montille
McIntosh MC2301

my old Viva Solista looks so good just sitting still.  I love that V-8 engine block chassis look...and that custom auto paint finish is the best,
of course when I turn it in and those 845 and 211 tubes light up ...I’m in love for the first time over and over again.

My 2 favorite tube amps are simply big badass beasts: for sheer “ King of the hill awesome” nothing beats the mammoth presence and sheer audacity of the [quad chassis]
Tube Research Labs GT800’s....
and for wicked absolute ‘coolness‘ the Wavestream Kinetics V8 Monoblocs have no peers either. Tubes rule... and with big enough transformers / caps / and enough output tubes, SS has nothin’ on them ( including bass )...just my 2 cents...