Zeppelin influenced many artists to want to be like Zeppelin...four piece musicianship, bravado, sexuality, big arenas, groupies. Van Halen, Def Leppard, Guns n Roses, etc. all wanted to be Zeppelin as an act, but weren't able to pull it off in a lasting and diverse way.
My sadness is that their style wasn't strong enough to keep hip hop/rap at bay. Those genre have been around longer than late 60s to early 80s hard rock, and for the life of me, I can't understand why the record companies continue to push it.