The Beatles.
I have so much to say about 'why' but it boils down to this:
I love all different styles of music to one degree or another. I love so many different artists from so many different time periods going back to the earliest written music.
I honestly could never, ever be satisfied listening to only one artist, one genre, one style.
All of that being said, more than any other group, the Beatles flirted with many different styles. Listening to one Beatles album vs another is like a completely different experience.
All of these decades later and I still discover something new when listening to their music. They quite literally changed the foundation of how we listen to popular music and what we expect from it.
They recorded something like 220+ songs over the course of 12/13 albums and enough loose singles for another two or three albums. Within seven years. Broke records, some of which still stand, while doing it.
Thus far, they are the greatest rock and roll band and likely to retain that title for some time to come.
It would be hard to list favorite songs, since so many are personal to me, so many more are iconic.
I'll cite three important albums.
Please, Please Me (their first album. Raw pop/rock sound, simple, honest, some bangers)
Revolver (their seventh album). Smack in the middle of their catalogue and career, a real blend of their early pop sound, their psychedelic period, and some rock and roll. If you're going to listen to ONE album that says "This is what the Beatles 'sound like'" that isn't a compilation, this is the album.
Abbey Road (the final album they recorded). The production on this is a sharp contrast to their first album. Like their Sgt Pepper's album, this one is still studied by modern producers, engineers, and artists. I can not say enough about it, BUT, if you're going to listen to it, "Side two" must be listened to as 'one track' essentially. NOT broken up into its various tracks. Trust me, this is important.
Thank you for allowing me to rant. 🤣