Radiator cover and shelves - you could do something like this on the wall behind the sofa and use it to display your pottery collection. Then we can move the tulip painting to one of the walls behind the TV.
This bookshelf uses a dark colour as a background to let the lighter pieces in front of it really stand out. Notice how this is quite formally arranged. Nantucket house by Nina Liddle Design. Oomph lantern in kitchen.