As PBR notes in his next post, the Doors were hardly acid rock.
They were straight out blues rock roadhouse bluesmen with a nice mix of what would 20 years later be called "rap" as laid down by The Lizard King at various random points throughout their performances.
Grateful Dead, played more shows and was seen by more fans than any other American band for a reason. Plus who else could play a 6 night run and play 20 different songs every night without playing the same one twice ? Jerry On !