That would be a neat trick, since the Rolling Stones ( formed in1962) and Pink Floyd (originally formed in 1963, as we know it 1965) already had recorded #1 tracks before Zeppelin formed (1968). And Zeppelin wasn't that original; they plagiarized a lot of their more successful material. Even Page has acknowledged that Plant "took some liberties" borrowing material, and lawsuits have been settled, including adding co-authors to some songs.