For me I find that my organizing is the best. That is, each album is in a folder. These album folders are in folders according to genre so by default I have playlists.
Transferring playlists seems something you don’t do often. Can you explain why you need the “best” and not just one that works for your current need, like transferring a playlist from A to B. And what, in your case, are that A and B?
I’ve tried a couple of tools and had bad experiences. Is there anything that can look at my Spotify library and copy all the playlists over to Apple Music (and vice versa)?