My all time favorite 60's & 70's type band would have to be the 2nd incarnation of Frank Zappa & The mothers of Invention,there was not a rock musician in the 70's that was putting out music at that level of complexity that wasnt already in the band.
Im not a simple beat or melody kinda music listener,i prefer complex music,allways have,when other kids were listening to janis joplin i was fascinated with miles davis .