The two most influental bands in rock Histroy...Black Sabbath and Led Zeppelin.
Sabbath: A pretty short argument...They invented Heavy metal as we know it today.
Zeppelin: Whatever I say good about zeppelin has already been said about a thousand times. But they certainly have their place in rock history...
The ripping guitar of Jimmy page, The monster drums of John Bohnam, The smooth bass line of John Paul Jones, and Robert Plant...the golden god of singing, with such great vocals...But who do you think has influenced more bands?