Thanks, Rina. I do like the location you suggest for the TV. My concern now is the sort of dead space underneath the three smaller windows.

The TV would be best in the space suggested above, so your furniture faces both the fireplace and tv. You can't figure out what to do about the space under the small windows until you have your big furniture pieces in place. They may need to go against that wall, or be floated in the room. It's too hard to tell here without measurements.

Maybe shelves under the three windows? Or long narrow table

yes, a console or a nice bench that can be added for seating as needed. congrats on marriage and new home. hopefully you have or can create a nice view out the larger window. you can put a couple of chairs and table there.

I'd put a bookcase under the windows