Disagree on the Beatles. You may think some of their stuff is stupid and I do as well, but you can't deny how influential they were. Joe Cocker, Steven Tyler, Offspring, Oasis, Jimi Hendrix, Elton John, David Bowie, and many others have covered their tracks. Too many interviews out there from artist that will list them as an influence.
OK - allow me to clarify.
The early Beatles were horrid. They had an impact on that generation but their early stuff is insipid and ridiculous - totally self-indulgent (to channel Cowell) commercial let's make a fast buck pop, no better than some of today's "cash in fast on the trend" artists. They were prolific at the expense of quality.
The serious Beatles stuff - some of which I will agree is pretty awesome, like Day In The Life and Yesterday - did not come until their pop culture moment had passed and they were able to worry less about making their name and were able to experiment. IMHO, the Stones were better from the get-go, from beginning until... well, until. Other groups were the same way - quality from the word go. You can even argue that Prince is an innovator too, and where is he on the list?
So for that reason, yes, they were influential, yes, not ALL of their stuff sucked, but I still intensely dislike early Beatles and disagree with them being #1 because of it. MASSIVE numbers of songs on the charts does not equal overall awesomeness.