What anout a bookshelf with multiple different shelf heights? you could decorate with lots of plants and other interesting items. If it were glass or open it would not make the area feel too cluttered...

I think you could put a pretty console table or chest of some kind there with one of your plants on the floor at the end of nearest the glass door. I am thinking the big leafed plant.

Then I would trim and re-pot (same pots, new soil) the other three plants....Looks like they have lost their lower leaves either due to moving them or lack of light. Not all is lost....by trimming them and re-potting them, in a couple of months you will have the start of beautiful plants. I am a plant lover like you must be.

I would coordinate all the pots so they were the same color and then stack them on varying height wood boxes so they have a bit more movement.

how about a bench with planter boxes?