Songwriting and longevity...The Who wins hands down, IMHO.
I thought Zep’s first album was amazing, the second only slightly less so. After that each album had progressively less I wanted to listen to until they finally became the epitomy of bloated, pretentious late 70s rock. At least IMHO. Plant singing about Gollum stealing his girl in Mordor was the end for me.
Um, that (Ramble On) was only on Zep 2! Plant was a HUGE Tolkien fan, and was only 19 when he wrote that song. Have a heart!