Yo dawg, I put most of my services in a Docker container inside their own LXC container. It used to bug me that this seems like a less than optimal use of resources, but I love the management - all the VM and containers on one pane of glass, super simple snapshots, dead easy to move a service between machines, and simple to instrument the LXC for monitoring.
I see other people doing, and I’m interested in, an even more generic system (maybe Cockpit or something) but I’ve been really happy with this. If OP’s dream is managing all the containers and VM’s together, I’d back having a look at Proxmox.