Just a couple more thoughts to the Beatles discussion...
1) George Harrison was a ukulele player and enthusiast, even in the unpopular years of the ukulele on the US Mainland. As such, the Beatles are instantly relegated to a higher status in the ukulele community.
2) More importantly, in terms of music history, we talk about the lasting qualities of music. In classical music, there have been millions of works by (likely) hundreds of thousands of composers--nearly all forgotten. Certain composers became represntative of their time, or showed a creative spark (or originality) that other composers did not. Those are the composers we remember. In a similar way, the Beatles were really the first modern "rock" group. While there were some precedesors to the Beatles, and many, many contemporaries--they emerged as the preeminent group. Not only did the expand and experiment with their own sound, they laid the foundation for all popular music after them. Their music directly impacted the lives of people currently in their 50s-70s, and their lasting legacy continues to impact musicians and listeners today.
3) On our music education technology podcast, we recently interviewed the CEO of UberChord, an app that helps guitar players learn how to play (ukulele is on their radar). The most requested songs to help people learn? Beatles tunes, by a wide margin.
Music has shifted so much that the sound of the Beatles may no longer be attactive to many young people--particularly those accustomed to heavy synthesized drum beats and other synthesized sounds. To those people, I would suggest that they expose themselves to the Beatles, perhaps through the "1" album (all their #1 hits), just to ground their own understanding of music and music history. The Beatles aren't going anywhere, however--they have earned a place in music history and will never be forgotten.
By the way, I don't know every Beatles tune, and I am not going to say that everything they ever wrote was great--there are people who believe that. But I will say that if you can cannot listen to and respect the Beatles for what they did, that's a problem.