The setup I see now could work. If you want more seating with minimal pieces go with the sectional route. I would recommend a round dining table since your space is small. It won't look so boxy especially if you are getting a square/rectangular coffee table.

Another option is to put your sofa on the wall where the TV is and the TV on the long wall if you like watching TV while cooking.

I would recommend "bare bones-ing" it for a week or two to see how you live in the space. That will probably tell you more than anything else what type of furniture to get and where to place it.