I'd probably go for a matte brass end table with a stone or glass top, just to break up all the heavy furniture. I might do the same for the coffee table, too. You could go either square or round.

This isn't the right dimension, but it's the right idea:

Grace Glass Side Table · More Info

I would pull the loveseat away frpm the wall/window a bit and center it on the window.

move the sofa to conform... a slim table (if you need one) or a cocktail table in front, even a C-table to move around as needed. you could put a slim tall piece of furniture where the floor lamp is...

If the three seater sofa is longer than the two-seater sofa, their position should be reversed in the room. Center the two-seater on the window.

Select a table that is about the height of the arm on the sofas or below.

Have you adjusted the arrangement? Can we see the results please.

You might try a round end table in the corner. You already have lots of sharp edges, so it might be nice to add some curves to the area. Note all the round side tables in each image below.

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