I tidied up the [artist=tommy-dorsey]Tommy Dorsey[/artist] listings, moving the "and his Orchestra" credits to the notes, and linking the related items. Hopefully this is more in line with our thinking.
The one item that I kept separate was [artist=the-tommy-dorsey-orchestra]The Tommy Dorsey Orchestra[/artist], c.1958, since Tommy himself was no longer around by then. I added 'See also' links for that listing. Seems to me that the Glenn Miller Orchestra had releases credited in a similar fashion when Tex Beneke first took over.