Best 2-way room friendly speakers

I think the premise you heard regarding speakers like the Thiels might need to be reconsidered. For best results, first order speakers like the Thiels tend to require the listener to be far away enough from them (>8') for driver integration and listened to from a standard seating height, but don't require much more than that which would be required from most other typical speakers, and in some cases would require even less placement optimization. One could go as far as claiming that at least with a first order speakers there is at least one seating position that offers a level of accuracy that competing designs can't offer at any listening position. In that two way speakers don't typically offer very deep bass response, room loading becomes less of an issue with them. Perhaps one of the most room friendly 2-way speakers might be the first order concentric driver Thiel SCS's.

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.