Wow...usually you and I agree on music, but I gotta say I see no relation with Zeppelin and the Who. I love both, but they are not very similar IMO. If Page took anything from anyone's book, I'd say it was Cream. I'd say Page had LOTS of influences before he formed Zeppelin, The Who would be on the list maybe, but way far down that list.
Also, let me say this, I said Page had lots of influences before he formed Zep, and I think there were many greats before them. But he took all those little things and turned it into something else. To me, Led Zeppelin is "perfect" Rock and Roll. They are still evident in anything you hear today. So to say they are Led Zeppelin ripoffs is unfair. I think everyne that came after them has ripped them off in some way or another. I honestly think music CANNOT get "better" than the mighty Zep.