I have a folder of MP3s, some of which date back to 1999, just a few years after the format was popularised. Most of them have utterly terrible names (think RIDEONAM.MP3). I think at this point they might even survive the heat death of the universe. And they’ll still be terribly-organised.
I gave up on trying to sort my initial batch and just started replacing.
First I try to find a full discography of an artist by a solid release group (for example "PEMEDIA or “88”). With those you can just copy the entire folder into the artist directory and plex/jellyfin etc will perfectly detect it. Then just add new albums as they are released.