Speakers that are good with tubes

Hilde nailed it

All tube amp got issues to control bass driver , because output impedance much more higher co compare solid state amp. You hear bass less articulate and more fatty .I say only speakers with active bass is ideal for music reproduction ,using tube amplifier.  You can see some brands included horn speakers but not to many on the market (my brand included)

I’d put forward tannoy Berkeley or even Tannoy GRFs 

Coincident Technology, Verity Audio, Reference 3a, most horn speakers, I could go on.  Hell, even Joseph Audio speakers are potentially tube friendly given their easy phase angles and is why Jeff Joseph doesn’t readily disclose sensitivity specs because that’s not the only factor that makes a speaker “tube friendly” or not.  You gotta get into the details of what frequency impedance drops, phase angles, etc. before determining if a speaker is “tube friendly” or not.  The devil is in the details, and also in the tube amp itself. 

Legacy Audio, Goldenear Triton Ref's or 1.r's.