Although covering Zeppelin should be an executable offence here is a good one by Tool of No Quarter
And of course the greatest cover of all time...easily:
Here is a good link of the best and worst. The Who are subject to two of the ten worst covers, Limp Bizkit - Behind Blue Eyes and Hilary Duff - My Generation.
http://digitaldreamdoor.nutsie.com/p...oversongs.html