Full range speakers, 40"-44" max height

I own a pair of  Joseph Audio Perspectives (graphene), 36" and wonderful.

I have a pair of Joseph RM25XLs for sale ($1500), ~42" tall

https://positive-feedback.com/Issue39/joseph_RM25XL.htm

and they are wonderful, better than anything else you can get ~$1500.

There is a panel head in every group!!

Martin Logan ESL  You pick your size based on your needs I have the X's

• 40" x 8-5/8" curved electrostatic transducer for wide sound dispersion, excellent clarity, and low distortion
• Slide right in under your requirement
• $5K a pair new
• Sound comes from EVERYWHERE!

The Wolf Von Langa SON or STAGE II are great options although hard to find used. They both are just under 40" tall. I have the SON and it is an incredible speaker with field coil driver. It is over your price point new and probably used. The STAGE II is going to be less, but I'm not sure if it is under $10k. THe interesting about the STAGE II is that it can be upgraded to the SON if you would like in the future. Footprint is compact too at 16w x 12d.

High-end loudspeakers in field-coil drive technology (wolfvonlanga.de)

Volti Razz. 40 inches tall.  Heavy (90 pounds each), but you will never ever need a subwoofer.  Big gorgeous soundstage and Greg gives you ability to tweak mid and upper frequencies. 

Audio Note. Living Voice. Volti Razz.