I don't know why I am beginning to sound like I am at my first AA meeting. However, I joined Spotify probably 2009/2010. It was great. It was all free, with no adverts then. That was great. I am now back.
When I remember more I will maybe come back and add again, however the biggest Spotify 'find' for me was 'the Sword'. This is the first band I ever found on Spotify through related artists. Hooked straight away. One of those things I always wanted to exist. Top Hit:
When I think of the others I will come back. However they will all come thick and flooding now because Sword added to listening to a lot of stoner rock/desert rock/doom/metal kinda of stuff. Spotify was great for finding new bands in that vein that had no public commercial success to justify major record shops selling.
So yeah, the Sword. I have seen them live four times; they always kill it. I have all their albums on Spotify, and CD.
Cool stuff. 70's influenced rockers. They can play. Great guitars. Great facial hair.
I guess my best discovery it was Martin Jensen - All I Wanna Do ( https://open.spotify.com/track/0BiGd2FNDQ0eh79ZHfp6tS ) and i also discovered a lot of acoustic / indie tracks. Already had heard about OH WONDER, but the other two you mentioned are pretty cool. If you want just follow my channel for more good music, daily.