Will you have a coffee table? Will that be under the position for the light or will foot trafic be underneath? If ou have a coffee table, you could do a chandelier -- something like this or this.

If you don't, you can do a flush mount like this or a semi like this

Your ceiling is on too high, so you should use a short Chandelier, I love to add lightnings and Chandelier in living room.
I also have beautiful scented candles in my coffee table that add amazing beauty in my room.

From Tech Lighting: finch. This comes in square, too.

Adding their Trace light, too - not at all per your specs, but I was curious. This is only 15" high.

Here's the Finch in place. Not perfect but it would be more 'transparent' than I'm showing. I'm concerned about adding that much black up high - it draws the eye.

Edited to say I like lascatx choices much more than mine! Cyrus:

Savannah:

Caitlyn: