Just try Roon on a trial basis. I guarantee you will be amazed. Out of 5200 albums - less than 200 needed cleaning up (cover art etc) and most of these were super rare or bootlegs or partial albums with just one track. Roon is the biggest revolution in audio since digital began. It is fixing the biggest drawback of digital vs vinyl - the loss of the gatefold vinyl sleeve with lyrics, background info etc. Roon has all the metadata. For classical albums that you have created metadata - you can have Roon prefer your metadata over what is available at Allmusic. It can be done in one step by selecting only the albums you want and then making a preference setting change on them all.
Roon also supports tags for personal customization
https://kb.roonlabs.com/Tags
https://kb.roonlabs.com/File_Tag_Best_Practice
Roon also supports tags for personal customization
https://kb.roonlabs.com/Tags
https://kb.roonlabs.com/File_Tag_Best_Practice