Originally Posted by Gandalf
By far, Cream (i.e. Jack Bruce) & YES are 2 of the top 10 bands of all time. I'm not picking them by popularity, but by muscian/musical talent and impact on the music industry. I don't consider Black Sabbath a top 10 (definetly in the top 100) but look at heavy metal bands now. Black Sabbath is by far the Grandfather of heavy metal, which I'm referencing my point of "impact on music". Led Zeppelin could be a top 10 band, too.
I'm not sure what criteria was used, but Zeppelin, while not my favorite band, would have to be top 10 because of popularity and being the beginning of so many bands that followed.
GNR, OZZY, AC/DC etc. are still played in every arena in the country during football games etc. because of popularity.
Today's artists are going to out sell older artists because more people have more access to buy than ever before. I also think you would have to have more categories and specific criteria to narrow down best bands. Too many opinions!