Please Recommend Highly Efficient Floor Standing Non-Horn Speaker Suggestions

http://coincidentspeaker.com/speakers.htm Owned a pair of the Triumph monitors years ago and they were solid performers. Israel has been doing this successfully for a long time.

Legacy, Fyne, NMST, Zu just off the top of my head. If you are using tube amplification you want a speaker with stable impedance that doesn’t go below 4 ohms. Salks need power.

+1 Zu Audio - Soul 6

Thank you thus far.  FYI: Amp is MC275 VI.  I have Legacy Focus SEs being driving by MC611s in another system and love them.  Perhaps Legacy Signature but I need a smaller footprint for the speakers I want to drive with the MC275.  Also, my pre-amp is a McIntosh C2700.  Release the anti-McKraken!

Apologize if this is redundant but the threads here all seem to recommend horn speakers for tube amps.

HMMMM maybe there's a reason?

Since no price range was mentioned:
Arion Apollo 105db efficient AMT line array but are 4 ohm.