Thanks for that playlist, Frank, which I've happily sampled. That's a good collection, but it's a little bit bland for me, it's what I'd play as background music whilst doing something else, if you see what I mean. As Gal said earlier, everyone has different tastes.
Over the years, I've listened to and enjoyed many variants of Country, World Music, even Scottish Pipes! Tastes change as well over time.
It occurs to me that the closest I've probably ever got to your Northern Soul, and one of my favourite bands at that time (the mid 70's), is possibly the Ozark Mountain Daredevils …. Country, I know, but very mellow.
https://www.youtube.com/watch?v=Qr0hcoksupQ
Meanwhile, a little indulgance for Gal and myself ...
https://www.youtube.com/watch?v=EsCyC1dZiN8