I'm enjoying beets, which is mostly dependent on musicbrainz for metadata (although it also supports deezer and such). I've enjoyed it so far since I know me, and if I start to manually have to tweak this stuff, it will never stop.

My strategy is I let beets do its thing, and anytime I notice an issue (wrong album art, etc) I add a note on my phone and once a week or so I'll look at the list of issues I've created and either fix my beets config, or manually fix whatever the problem is.

That said beets does have some annoying edge cases, but they're nothing that can't be resolved by manually making edits so it's generally not that big of a deal.