R227 and r228, What utter twaddle. The Beatles may have started with covers of "Long Tall Sally" and "Twist and Shout," but very quickly became Pop composers non parcel. Plus they each played a musical instrument.
None of that can be said of the (enormously talented harmonic) Backstreet Boys. The Beatles "became like" nobody who came after. They didn't transition from any lesser group to another.
The Beatles can be compared, if need be, which there isn't, but people will so compare, in the 20th--21st Centuries---in terms of being a lightning bolt of musical and social change, a bolt that struck the Earth and got it all shook up but this time with a British accent---ONLY to Elvis.
Arguably the force of Black America straight outta Compton was the third earthquake, but that's literally another story.
As for their physical attractiveness, you guys and gays simply have no clue, even if you're a Boomer like me (a Frau). I was 14 in February 1964, and overnight girls my age were calling themselves "Paulette," "Johnette," "Georgina," and the like (not with Ringo, though; NEVER Ringo. Nobody ever thought he was cute, let alone sexy! And we knew who Pete Best and Stuart Sutcliffe were, but didn't go all Astrid over either.).
We worshipped the Beatles. We bought their music (remember Sears?!); spoke their slang ("gear," "fab," etc.); quoted their interviews ("Arthur," "Turn left at Greenland"); adopted their (and Jane's, Patti's, Cynthia's) bangs-heavy hairstyle; wore black half-boots.
We bought John's books. "In His Own Write" saw some poems re-printed in, and thus the Beatles' getting America's imprimatur, the All-American "Saturday Evening Post," which poems caused my "Greatest Generation" father to declare Lennon a genius! Maybe it was "No Flies on Frank"? What other musical group and or solo artist had branched out like this, creatively, and not just to movies? Speaking of which....
We went to see "A Hard Day's Night" numerous times, and over a half-century later can yet recite entire bits of dialogue ("We fought the war for your kind!" "Bet you're sorry you won.").
We followed their personal journeys, even unto India. I attended my university's concert with Ravi Shankar, impossible without George.
Most infamously, the Beatles influenced Charlie Manson, such that the misspelled-in-blood "Healter-Skelter" aided in tying La Bianca to Tate.
To bring it to the present: Cute Beatle Paul---now a "Sir," but then again, the Beatles had from the git-go enchanted the Royal Family ("You in the front can just rattle your jewelry"---still sells out stadiums.
Maybe "You Had to Be There" for Jenny Lind. Maybe YHTBT to understand Bing or Frank or even Elvis.
But I KNOW YHTBT to "get" the Beatles.
And the 60s.