I would get chair with arms. People generally don’t want to sit in armless chairs. I would do a neutral and you can change out accents easily. Here are a couple. Most furniture seats are about 18” high. So chair at that height is best for guest seating. You can do a color it just depends on other elements you are putty in the room. The photo you posted I assume is from manufacturer not you home? Make sure when you place a rug, put rug at least 6” under furniture on all sides. If you don’t have a rug, get that first. Then you can get chair and coordinate colors. Rugs are harder to find than accent chairs. Also, a chair with open legs helps make space feel bigger and more open especially when you are planning a large sectional.

Thank you so much Flo! Both of these options are fantastic! And yes the photo was from manufacturer. I have a super large area rug and it sits under the feet of the sectional on all sides as you described! Thank you so much again!