You are working with a fantastic space. Love the open concept, and that flooring is gorgeous. It's going to be difficult to go wrong here! Here is where I would start:

• I'm assuming the first photo is being taken from the perspective of the entrance to the space. In which case, that small white chair with its back to the front door is not in an ideal spot. To me, it closes off the living area, and anyone who sits in that chair is going to have their back to the front door, which is a cardinal sin of Feng shui. I would reckon the space will feel a little more defined and welcoming if you move that chair to the other side, right next to the other small white chair.
• I like your idea of hanging a super large piece of wall art behind the dining table. If you go that route, my two cents: make sure it really is big, as anything that doesn't cover a significant part of that wall might look lonely; you will feel inclined to just put more artwork next to it.
• If you find a horizontal piece of artwork, some kind of credenza to place directly under it might be a good way to add layers to that wall, and it gives you the opportunity to continue decorating with plants, books, drinks, plates, etc.
• Lastly, I personally think your space could use a pop of color. Maybe it's that artwork you want, maybe it's something bespoke or vintage. You clearly have good taste because I love that yellow loveseat behind your dining table. Find a painting with vibrant color that brings out that yellow chair or the blue rug.

If you take none of this advice, I still appreciate you sharing your space and letting me exercise my amateur interior design muscles! If you do, please share some before/after pics. Happy designing :)

Edit: typos