As an old fart who grew up when the Fab Four was getting all the hype, I have to agree and disagree.
The beatles brought a new type of music to the fore. I will always wonder how, without a formal musical education, McCartney, Lennon, and Harris came up with "rock" music with so much classical influence in it.
Don't believe me?
Check it out and you'll be blown away to discover how much of the chording came from the classics.
However, as far as absolutely awesome harmony - nobody beats the original Beach Boys.