My favourite bands which i also think are the BEST in the world go in order like this 1) Rush(Canadian rock band, awesome, the best drummer in the world is within them) 2) Pink Floyd(Probably my favourite, Dave gilmour truely amazing on guitar, while Nick mason, Roger Waters, and Rick wright all would be lost with out them. 3) Led Zeppelin(Jimmy page, probably the best guitarist ever, even though robert plant and Jimmy page make a brilliant duo in a few latest albums like 'no quarter' Together they were the best rock band Britians EVER seen.
Other. I like Pantera better than all them...xP but really now. This is all opinion. There is no telling who is the greatest, just who is most widely liked.