As an equally reluctant option one side or the other to Amazon, Apple's "iTunes Store" still exists and is "mostly" DRM free, if you don't mind AAC and friends (MP4 Audio) rather than MP3. It's getting harder and harder to find those Buy buttons, especially if you start from an Apple Music link/the Apple Music app, but it's currently no worse than Amazon as Amazon and Apple seem deep in direct competition on how hard they make it to find Buy buttons.

Amazon hates Canada (no Amazon music store, no Household plan) so here the tool of last resort is iTunes Music Store (it still exists, apparently).

Heh, I commented this exact list in order before reading your comment :D

also Bleep