Obscure Masterpiece Songs?

I've been discovering obscure music, making playlists. So many great unknown songs!

Does any have any super obscure songs to recommend? (No self-promotion, please.)

My taste is generally folk and indie. Example: saw this band 10 years ago and was blown away by their bluegrass meets prog. Band is long gone and i have no affiliation: https://open.spotify.com/track/1Mo56rUwhX8zQl9aRCdE6y?si=iSphLcSxQF6z4EEeQiQTPw