I've found similar problems with a bunch of group names. For instance, I want to listen to more Gerry Mulligan, specifically Gerry Mulligan and the Concert Jazz

I've found similar problems with a bunch of group names. For instance, I want to listen to more Gerry Mulligan, specifically Gerry Mulligan and the Concert Jazz Band, which had a Complete Verve recordings album that I got from the jazz collection at my university's music school, but Spotify and Apple do not have. They did several other albums and Mulligan had other groups (trios, quartets, etc) but they're hard to correlate together. Many of the jazz greats were in the boat where they performed on a lot of things that wouldn't list them as primary artists, but that's how you need to find them to find 95% of their work -- especially in instruments like my favorite: trombone. Band leader vs band members doesn't even have an ID3 field to the best of my knowledge without just sticking them all into the artist field. Compound that with the amount of jazz out there in the no-copyright state (because of age or racism or both in the distant past) that only exists in a collector's collection as a 45rpm stamping with low-ish quality and it turns out that there's a lot of missing music from pre-1950 or so.