No, they're not. The Beach Boys, Motown and James Brown have just as good as an argument than the Beatles.
No, they really don't.
The Beach Boys...or at least Brian Wilson... are personal favorites. But they readily admit that they chased the Beatles as the measuring stick all throughout the 60's. Their international appeal lasted a very short period of time, mostly because of the Beatles stranglehold on the charts and the public.
Motown isn't a musician or a band.
James Brown had nowhere near the commercial success, nor the longevity at the top of the game, that the Beatles had.
All were influential. None were remotely close to having the influence that the Beatles did.
People like to be contrarian and interject personal preference. The Beatles changed fashion, hairstyles, attitudes, social mores. Spoke about relevant topics in an era before musicians were afforded that luxury. Owned their own music and publishing rights, again when that wasn't the norm. Wrote, sold and are played more than any other two artists combined.
Everyone was influenced by someone. Nobody's influence was as far reaching or long lasting.
Haven't seen her mentioned but even if you don't like her music Madonna's hugely influential with most modern female artists. All the wild/risque outfits, the sexual styles and lyrics etc.
Call me gay but I actually really enjoy all her music. I downloaded her catalog about a week ago and spent about an hour playing her hits. I love the old stuff, from the first...three albums I guess. Lucky Star/Material Girl/Into the Groove/Borderline/Holiday/Papa Don't Preach
All incredible songs. Love them.
Although I've noticed that I have a deep affinity for all 80's music. I'm just getting into the Cure and INXS among others.