Originally Posted by Dr. Johnny Fever
The Beatles or Elvis Presley.
Only a Deejay would confuse the influence of these two artists.
Visit any Pro Audio/Engineering/Producing forum, whether it's Gearslutz or ProSoundWeb or Dave's Place or PSW and do a web search on Elvis or The Beatles. You'll get literally TEN MILLION threads about the Beatles, their recording process, overdubbing process, questions and answers from guys like Ken Scott and so on.
You'll find very few about Elvis.
Elvis was an AMAZING entertainer. He was and still is the coolest singer/frontman of all time, IMO. He's been copies but never duplicated. The man was a True Original.
The Beatles, on the other hand, not only changed popular music forever, they changed the way popular music was recorded and delivered. From syncing up multiple four-track machines to Abbey Road to George Martin to their competitive nature (Sgt. Peppers was a direct response to Pet Sounds) to visiting the Maharishi to using acid to expand their minds, to the British Invasion to the introduction of Chuck Berry, Muddy Waters and countless other "American" artists, The Beatles influence is unparalled.
I could spend hours commenting on innovations in sound recording and songwriting as it pertains to The Beatles but I won't. This is not the proper forum.