Good songs that aren't part of popular culture
Popular music mostly sucks today. There are tons of very good songs out there that no one has ever heard of, or maybe even heard.
Some songs even seem timeless.
Take "Bonny Portmore" its hundreds of years old, and about a tree, but the music is very moving. I especially like Laura Creamer's version.
What about classical music? Like Holst's "The Planets" or "A Night on Bald Mountain", or even Opera? like "Carmina Burana" of which most people have atleast heard "O Fortuna" but they probably don't know what it is.
Even modern stuff from the 60's 70's and 80's. Total Eclipse of the Heart is a much better than any love song the pre-teen singers of today put out.
When I was in highschool I used to think that people who didn't like popular music only felt that way because they wanted to be different. And although I feel the popular music of my highschool years was much better than what exists today I now realize that back then I simply hadn't heard what the world had to offer.
Re: Good songs that aren't part of popular culture
There's plenty of good popular music today. It's not all Justin Timberlake and Christina Aguilera. There are bands like Ben Folds Five (Ben Folds nowadays though), Godspeed! You Black Emperor, Sigur Ròs (my personal favorite), Rufus Wainwright, Aphex Twin (Richard D. James), The Flaming Lips, &c., all of which I have heard on Detroit radio (and it wasn't even a college station). The talent in some of these bands/musicians is frightening. In fact, I believe we are among the most literature and artistically cultured generation that has ever walked the Earth.