Hmm A dining table came up when I checked your link but here is an idea for sectional seating...use a chaise on the end(s) instead of a regular corner piece. That way the corner will be used. If you want a U shape, perhaps you could use the chaise on only one side.

Thank you, for getting back to me. I like your idea. Yes, the link is to the table, the only piece of furniture in the room. I included it to give an idea of the look I'm going for in the room.