When you think about how many people cite the Beatles as influential, it's largely considered a good thing. I always point to Millie Vanilli as one of my earliest musical influences but it is wholly as a negative as they shattered my innocent ignorance regarding corporate music. I think I was 8 or 9 when I refused to watch an episode of the Super Mario Bros. cartoon because Milli Vanilli made a (unwelcomed) guest appearance.
Even after the Beatles broke up, John and Paul continued to have a monopoly on where popular music was going. Just take a look at how Paul and Wings were completely ripped off in this Ratt video.
Granted that there were some other, less obvious and contemporary influences in Ratt's look and sound. But it's hard to deny that, a dozen years after he sang "Maybe I'm Amazed" at that concert, Paul's influence was all over Ratt like Aquanet on, well, Ratt.