The Crash Test Dummies of the 90s struck me as heirs to that creative vein about 15 years ago.
The song from that era going through my head the last couple of years is “Time” by the Chambers Brothers.
With everything going on today, I'm having "We gotta get outa this place" flashbacks to '68.
But I too, like you, was fascinated by the Chambers Brothers, "Time." That change in tempo, with lots of reverb, etc.