I only have #4, 5, 9, 10, 11, 12, and 15 in my main listening room. Yet it sounds great!

As long as someone a) has a great recording, b) listening to at least 5.1 upmixed audio on neutral full range speakers, in a c) typically furnished living room with rugs and curtains, it's going to be a good audio experience.

I think stereo listening is far more demanding of good room symmetry and acoustics, in which case I'd agree with your list.

Author of "Status 101: How To Keep Up In A World That Keeps Score While Buying Into Buying Less"