Such a nice space! All that wood is going to boss around your decorating. You are smart to try to work with it instead of fight it with cool colors. I think orange is definitely out as an accent color. It is just going to enhance the orange tones of the wood. I would consider painting all the doors in the dining space, it will make the space look less chopped up. I saw on another thread that you are replacing the kitchen floor. Have you considered a slate look tile with faint brown accents? Your floor will have a nice clean look and the accents will work with the wood and will look good with your taupe cabinets. Daltile porcelain slate.

I am not a color expert but I used SW Modern Gray in my previous home in 2 rooms, one of which had fairly low light and it was beautiful. Got many complements on it. I am surprised it is not touted more. (really, I do not get a commission for suggesting it :).'here are some rooms to show it used.

I use Blick Gallery frames for the art in my husbands office. These open easily in the back. I use thick ones, so cut pieces of foam board to take up the excess space and use an acid free mat. I also use a thin piece of acid free foam board behind the print. They are very economical and very simple in style. They might be too simple compared with the frames you have now, but that may work with your new home style and give you time to slowly reframe your art. If your art is mostly framed prints, opening the back and changing out the mat is not difficult in many cases.

@JustMe Here is a rough drawing with dimensions of the office. My desk is on the longest wall. The window at the bottom of the drawing. My desk is about 72" and I've been seriously thinking of getting a different wood desk top that is smaller at about 63" to fit on that wall space next to the door. Something like a mesquite desktop or something. My desk is a standing desk so I'll be keeping the black base. The reason why I didn't put my desk against the window is mainly because of the giant monitor that is on an arm that wouldn't let me look outside anyways but I'm open to options. I do really think that my desk is way to big though. Also, the closet(which is at the bottom left of the picture in case its hard to tell has built in bookshelves. Although shelve space is always good, I've been looking at tons of wall shelves to utilize the vertical space more. I also added some more offices I liked to my profile. I'm a big fan of the contrasting natural colors and I want to incorporate live plants and such as well.