I like all the songs that had already been recorded by other bands, then Zep recorded their own version and claimed as their own. Those are all really great.
:flush:
Yes, there are a few instances of their earlier stuff borrowing from previously recorded blues songs. There are also several songs where Plant's lyrics are homages or inspired by other music, but that's true of most rock bands. There were a ton of songs that they did give credit to the original songwriters or listed them as "traditional arranged by Page/Plant".
However, the vast majority of their stuff is completely original and phenomenal.
https://en.wikipedia.org/wiki/List_of_Led_Zeppelin_songs_written_or_inspired_by_others