Orchid, off center, and can you move the whole arrangement closer to the other room. It looks very crowded, especially considering how much space is there. I assume this is centered on the wall, which is not necessary

I really like that console. I think if you did a wainscot, or board and batten, painted a diff color, and brought in a runner (and painted the doors) you'd have a completely diff look. and the light, if you can swing it. I don't think the current gray color on the walls is doing that space any favors. maybe it's the photo, but I think you could do better. I still like that board and batten picture in the Navy. I think that would look great w/your entryway use your imagination, but here's a similar console w/some white lamps, texture, but look at the dark wall behind it w/the bright white trim. Would you like that in the entry? I'd love these colors w/your wood floor. just look at the wainscot and dark charcoal/navy color. I'm still partial to Wrought Iron for the wall and doors, but maybe you want a diff color? Raccoon Fur? Witching Hour? I'm thinking this look. dark upper, white wainscot. (or the reverse) Maybe you like lighter? here's more of a board and batten wall treatment. diff ways to do it. If you like the more neutral colors, you could try some of these: for example, look at the wainscot behind this similar table , and the textured rug and other decor elements If you like those soft sage/ivory colors, you could try this. the white for the wainscot, the clary sage for the walls, and maybe the darker green for the doors. Simple flat panel wainscot (this is pretty simple to DIY) with a gray/green upper wall. paired w/your table and some other accessories...looks nice. you could even do a simple beadboard wainscot and paint it sage. or whatever color you like Blue your thing? blue/green colors w/the ivory Or, if you like a soft blue,,, Topsail on the walls, white wainscot, diff decor elements on the table. Area rug w/natural and light blue tones would look fine If you like more of the farmhouse look? with shiplap and wallpaper?

I am not a fan of niches. I would sheetrock over it. Then either a mirror with a console under it and a lamp. Or a large piece of art. You can certainly still put a large piece of art in the niche. Not sure about chairs there.

The house is lovely. It might be time to step-up your design style to complement the architecture of your home. This cabinet below is from Crate & Barrel the mirrors from a variety of sources. Looks like the living room furniture could use a boost in terms of style also. Why not consider a fountain outside the entry instead? Your other choice could be in the curve of the staircase, but I would select something tall and narrow nestled in tropical plants. I would leave any green to tropical plants and select a dynamic area rug for the foyer.