Here are a few ideas Marie, I did this for someone a while back.

In your case, you can use a vent-free fireplace like in the first picture.

Or you can try doing something like this a [Nice Wall Unit [(https://www.houzz.com/photos/custom-designs-and-model-renderings-contemporary-new-york-phvw-vp~46015491)

All new units are IR and don’t need to be visible. Everything but the speakers can go inside a correctly sized entertainment center. Looks like the cords are already run through the wall.