Abbey Road, followed by the White Album. My main issue with most all of the albums prior to these was that, as they were recorded on four-track tape, bounce-downs became inevitable. With each reduction mix (bounce-down), fidelity is lost. As they began to explore more artistically, they added still more ingredients, resulting in further reduction mixes.
I should mention that in NO way does this diminish the incredible worth of these recordings, but with the switch to eight-track, sound quality and fidlity improved.
great synopsis.

(I'm the least qualified, technically speaking, but the way you described this brings great aural anticipation for a really pristine experience when we eventually hear them like this!)