I have flailed around forever trying to find something that suits on Linux, mostly I use Internet Radio these days, (have a small Yamaha Amp and decent bookshelf soeakers and sub) and just use ther app seems to be 10000 specific channels, like best songs of 1973, or best of AC/DC or whatever. I use Radiodroid on Android as well

I used to just stuff a 1TB SD card full of MP3s and use that on my Android phone but alas those days have mostly past.