I'm for either option #1 or option #4 because their details both go with that beautiful mirror. You already have a lot of dark wood in the room to go with the dark wood coffee table option. Beside, if you purchase the dark wood chest to place under the mirror that was discussed in your other post you don't want to overwhelm the room with too much dark wood. I do agree that switching the sofa and chairs would work better, and removing that tall oval table as well since it seems to block the view of the room. I would also put the curtains on one long rod rather than two short rods and have them shortened just a bit so that they don't puddle - that look is out now.

I like option #2. The dark wood ties in nicely with the dark wood on your occasional chairs and will contrast nicely with the light colored area rug and will ground the space. The oval shape also ties in nicely with the arch design on the wall and promotes good flow, which I know is one of your concerns. I would just make sure whatever coffee table you choose is the right scale for your sofa since the sofa is on the petite side.

I think option one goes best in this room and I agree with moving the couch where the two chairs are. Can't wait to see what you decide!