I don't know if this is what you want, but on my compilations, I assign individual artists to the artist tag and pick a fitting single name for the "album artist," so all the tracks will be grouped appropriately when needed, and separately by artist when needed.
Take note, also, that the Album Artist field in MC is not mapped to the Album Artist field in iTunes. The correct field for that in MC is "Band." So use the copy fields feature in MC to update the band field to match the value of the Album Artist field.
Also, remember to update your tags from the library if you want the correct info saved inside the files.