Ok, so here's the thing...
The top priority is getting all the info about a track, artist(s) or album and getting it right. Who gets credited for what is secondary compared to a visitor looking for a track here and actually finding it.
This is why we have a 'facts' section and, perhaps just as importantly, a keywords section. Tim Ryan reminded me long ago to add 'Christmas' to the keywords on every Xmas song page in order to find them more easily - because you can use the search function to look for keywords, too. When in doubt, add it to 'facts' or as one or two keywords. Just get the info on the page. Don't put it in the artist name.
That's what this is about. Visitors finding a page and seeing all the correct info there. You guys now have all the info about this so just put it under 'facts'.
It's starting to slip my mind now, so I'd better type this out before I forget. Since someone is using this as a trolling tool, here's the actual list of artist importance to a page according to my unwritten rules (as always, it's Wayne's site - he can change it whenever) - rules which I really should write down somewhere.
1. Public artist (and/or alias) or media franchise (ex: Pokemon)
2. Actual artist (such as a seiyuu)
3. Actual accompanying musicians (or their alias) - sometimes, but not always, included with actual artist
...and the rest is gone from my memory for the moment. Yeah, blame me for being focused on my new show script. You'll be too old to multitask someday. It'll come to me....at 3 am, probably. I'll type it out when I remember it. But for now, just go by that.