iCloud and Media Purchases for Family

Apple’s account migration won’t work with my Apple accounts. Their support can’t help. I have an iCloud account I have used since iCloud began, and it has all my legacy content and purchases. I’m married now with kids. My wife and I have always used our own iCloud account but shared media and purchases. I now have an Apple one subscription for the family. Is there a way we can all use our own iCloud accounts on any device, but the legacy account for media and purchases, BUT have our own Apple Music libraries? The way it’s setup now is that when media and purchases are set to that legacy account when I go to iTunes I can see any playlist that my wife adds or her music stats. For now, I’m using the legacy account as a family share. (It’s one of my 6) All my Apple TV devices and what not are on that. We are all logged into everything with our iCloud and media & purchases. What I don’t like about that is I don’t want to purchase movies and music and have them not be in that joint library. I would rather keep them all consolidated. Only way I can do that, is if everyone has media and purchases as the joint account. Problem with that goes back to iTunes showing each others playlists and music.