Single driver speakers without the pitfalls?

In researching SET amps, I have learned a lot more about the sort of high efficiency speakers that they are typically paired with, including single driver models like Omega, Blumenstein, Teresonic, etc.
The advantages of these designs are well acknowledged: coherence, imaging, high-efficiency and so forth.
At the same time, there seem to be equally well acknowledged drawbacks to these designs: Limited bass response, rolled off highs, and a harshness or "shout" in the upper midrange.
Some designers, like Tekton and Zu, seem to take the approach of getting the best of all worlds by joining a wide range driver to a tweeter of some sort. (To some extent, my Reference 3AM De Capo monitors take this approach.)
What I'm curious to learn is whether you think there are any single driver, full range systems that transcend the above limitations.
Eager to hear your thoughts.
Horning Eufrodite: 98 db sensitivity, 8 woofers per side, no crossover. With 10 watts will fill a large room with full-range sound. A very nice speaker.
They do buzz. That's how they "attempt" to get high frequencies. Resonance, not signal.

AM radio is a great comparison.

Most of those threads are right on.

I thought the Voxactiv might have something after I read about them. How did they overcome the problems, I wondered, after reading. They I heard them. Then again in another setup. Then another setup.

I hear lots of distortion above 2k. Buzzing. Like a "humazoo". Or a kazoo. I can't see anyone how knows the sound of real music not noticing the bad things these do.

I am not sure you are going to find a single driver speaker that gives you the magic that your deCappos do. I went down that rabbit hole years ago and didn't like what I heard.