I personally love Led Zeppelin... It is perfectly understandable if you don't like them. That said you cannot deny their variety and mastery. Folk, Blues, heavy metal, rock, country, funk.... They did it all and did it all well.
As for their fidelity what Rock band out of the 60's and 70's can be characterized as being absolute reference fidlity.
I had an argument with someone the other day, he was saying Zep is the worst of all time. I just walked away. So the facts speak for themselves and all of the above is merely hyperbole.
Great Lyrics from Plant,
Legendary Riffs from Page,
Most underrated bassist keyboard player ever in Jones,
Monster behind the kit in Bonham.
STFU about Stairway to Heaven.
ACHILLES LAST STAND IS THE MOST LEGENDARY EPIC EVER.