Add the ability for metadata sources to use an artists "main/canonical" name instead of the name that's credited on the work

[Alariius]

On Musicbrainz and Discogs (and possibly others) there is a lot of flexibility in how an artists name can be credited on a specific work. The name can be capitalized differently, use an alias or multiple artists can use weird and non-standard joining characters between their names.
This can result in either a single artist appearing multiple times in a library under different names or multiple artists (or multiple spellings of an artists name) being interpreted as a single artist.

I'm currently dealing with this by changing the artist name manually after importing in cases like this. It would be great however if there was the option for a metadata source to look up an artists main name and use that one instead.

Since the aliases and different spellings of an artists name still use the same ID and link to the same entry on Musicbrainz and Discogs I don't imagine this would be too difficult to implement.

If there already is such a feature/plugin or a way to achieve similar results I would appreciate if someone could tell me how.

[RollingStar]

Related: https://discourse.beets.io/t/plugin-idea-expose-also-performs-as-for-album-artist-field/1541