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Actually I remember ROB45 saying Mario Galaxy has a high tier soundtrack for Mario but it's still only above average compared to other 3D platformers.
I can post a link if I could find it but it was a thread either by the username "DumDumReturns" or "NewDumDum".
If you are referring to each soundtrack as a whole and not individual tracks, then yes. The gold standard for 3D platformer music is Sonic games (with certain exceptions). I could tell you the name of each track in Unleashed or Adventure, but not in Galaxy or Galaxy 2.