A few snippets from Richie Unterberger's biography of The Beatles:-
"So much has been said and written about the Beatles -- and their story is so mythic in its sweep -- that it's difficult to summarize their career without restating clichés ...they were the greatest and most influential act of the rock era, and they introduced more innovations into popular music than any other group of their time....they were among the few artists of any discipline who were simultaneously the best at what they did and the most popular at what they did. Relentlessly imaginative and experimental,... always staying ahead of the pack in terms of creativity and never losing the ability to communicate their increasingly sophisticated ideas to a mass audience. Their supremacy as rock icons remains unchallenged to this day... They synthesized all that was good about early rock & roll and changed it into something original and even more exciting. They established the prototype for the self-contained rock group that wrote and performed its own material. As composers, their craft and melodic inventiveness were second to none; they were key to the evolution of rock from its blues/R&B-based forms into a style that was far more eclectic, but equally visceral. As singers, both John Lennon and Paul McCartney were among the best and most expressive vocalists in rock, and the group's harmonies were intricate and exhilarating. ...in the studio, they proved instrumental in pioneering advanced techniques and multi-layered arrangements. ...the popularity of the Beatles, however, proved eternal....like any great works of art, the Beatles' records carried an ageless magnificence that continues to captivate new generations of listeners."
A career rock historian pretty much only gets to write the above statements, once. And that's as individual statements: to amass them all in describing one group, says something about The Beatles.
cheers