What even is an "excellent room". That’s the most nebulous part of this abstract hypothetical. I find myself quite happy just avoiding obviously "terrible" rooms (also nebulous, but less so). I think a decent room can generally be made to shine with 2ch stereo, as long as you invest in careful setup and pick an appropriate size & spec of speaker to match room size.
But playing by the rules as you’ve posed - yeah I want NOTHING to do with any large & expensive "fussy" speakers. That just screams to me of some monstrosity with multiple cone drivers spread miles apart (incoherent sound), plus some crazy impedance / phase curve, wild frequency response, and a low efficiency that turns amp selection into some sort of Lord of the Rings style quest.