I think it depends on the recording as you've discovered. I find quite a few old jazz recordings are almost entirely split left and right so the only center "fill" you have is less directional sound like drums.
Are there speakers that disappear regardless of the recording?
I have a pair of B&W 805d3’s. Strictly analog system. Source is the Clearaudio Ovation, Hana SL cart. Herron VTPH-2A phono stage. Rogue Audio Cronus Magnum II integrated amp. The speakers sound great most of the time. I have many records that cause the speakers to essentially disappear with a holographic sound stage, beautiful imaging and great dynamics. Some other records, not so much. Curious if there’s a way to achieve disappearing speakers no matter what recording you throw at them? Thanks!