

It seems like the most obvious answer is to build your own with a Pi. Run Linux and then install any player you want. You could even use the Pi as the head then network your storage.
Also, FWIW, the latest Apple TV hasn’t seen an upgrade in about 3-4 years, so if you do go that route, bear that in mind. A new model is coming sooner than later (hopefully this year).
The aTV will give you the best experience when it comes to dark patterns. But just note, a new model is on the horizon, so hold out a little longer.