You didn’t mention your budget. That will impact things.

If you have a closet with a rack you have a lot of options, hardware-wise. If you’ll be running this in your living room, for sake of your sanity, something like an AMD mini-PC with a small NAS for additional hosted storage via NFS would probably be your best bet.

A PC with Proxmox could do this handily. I have a cheap Ryzen 5500u mini PC hosting my Plex server, audiobookshelf, home assistant, and DLNA server (AssetUPnP). It’s only 6 core/12 thread and32GB RAM but still has resources to spare. You could totally do an 8c/16t one and throw more RAM at it.