Best 2-way room friendly speakers

I don't really think that first order speakers really need extra room treatment compared to most other designs. Still the Thiel SCS's somewhat unique concentric driver design eliminates the driver integration issues that are needed for optimal listening of most first order speakers.
A past long time contributor who stopped contributing when he became part of the commercial side of all this; Karl Shuemann of AudioMachina's first offering, though perhaps challenging to find, was a 2-way first order speaker which incorporated some wave guide principles. He seems to have abandoned the wave guide with his latter more ambitious and expensive designs. Though I've never heard any of them, they sure do look promising.
Though I doubt these are what you had in mind, as they meet your criterion and are purposely built to negate room interaction, I'll mention them: the Innersound speakers.

Cdc,

When properly amplified, the SP Tech Minis are solid at low volumes. This said by an apartment dweller who listens late into the night.

Where are you located?

Audio Physic. Just follow their setup instructions and room size guide.

Merlin TSM seem to disappear in room and no need for sweet spot listening. I have had them set up for a couple weeks in a temporary room and couldnt be happier.

Yada, yada, yada. Sorry, no disrespect intended to well intended suggestions, but you don't provide nearly enough information for truly meaningful suggestions. What amp? Are you keeping the Denon? Where are you placing your speakers in the room? What is the room like? After 40+ years (ouch!) in this hobby, about the only thing that I have learned with absolute certainty is that generalizations mean very little; ESPECIALLY re speaker placement and speaker/room interactions.

In your system page you give glowing reports to the sound you get with your one-way speakers, and you do a good job of describing what you like about them and why. Why not keep them and add a subwoofer like a REL Strata for full(er) range sound? A lot of flexibility re sub placement, and you get to keep everything that you like about your current speakers; and more, as a well integrated sub will improve just about everything.

Good luck.