I guess I could have made myself more clear. What makes the best band of all time. Is it the sum of its parts? Is it the fact that they are the best at their instruments? Is it clearly just the one you like best? Is it who sold the most records or had the most fame. What defines the best band?
I think The Who with Keith Moon should get a mention as well.
I think you've touched on an impossible question, which is why no one is answering what you've asked. There's plenty of bands that sell tons of records that I think are awful. Wouldn't rate in my top 100. There's some, like Rush, that are great at their instruments but wouldn't make my top 20.
Unfortunately, as you suggested here and in your first post, it must be a very unique and individual thing.
If it was just records sold out would be cut and dry. If it was concert tickets sold, also cut and dry. Top live performance? I hope not because I don't think KISS should really be in the running for best band of all time.
There has to be more to it than personal preference though. My favorite band is Pink Floyd, but I wouldn't call them the best of all time.
If you think about it in terms of another discipline, say who's the best athlete of all time or who's the best sports team of all time, it's easy to see the question is way too vague to have a real answer. There's not enough commonality among athletic events sports or music genres to call out one single best of all time across all of it (it being music or sports or athletics).
If there was a gun to my head and I had to give an answer, I'd say Led Zeppelin because it's an easy answer and hard to argue against. But if i had a deaf friend who had a miracle surgery to give them hearing and they asked me to play them the first piece of music they could actually hear, I'd probably play Van Halen (I also don't think they are the best but it's a good starting point).