I've been a bit of a fuddy-duddy with music most of my life. I grew up with Spike Jones, Six Fat Dutchman, Sophie Tucker. As a teen I couldn't stand the Beatles (sorry Odeon), but was a Dave Clark 5 fan. All my life I've liked bagpipes, harp, classical, some show tunes and quirky music (Napoleon XIV). But I also liked Chicago (DOA), and some generic current stuff.
I guess I never found the river and don't worry what is mainstream. I listen to what I like and don't worry about labels. I have found that I usually don't like songs that ago on over 4 minutes or that are operatic, guitar or violin solos.
In all honesty the best Thanksgiving music are the sounds of a healthy, happy family.