It would be to your benefit had you stuck to one post. No one reading this one would see the suggestions you asked about chandelier in the abutting entry, open to the dining room.

https://www.houzz.com/discussions/5840592/help-with-foyer-chandelier

So, I will take the plunge here and say I do not like the light you have chosen for the dining room. The trim is of Greek architecture (Corinthian...which is quite formal/decorative) and the front door and spindles are more Mediterranean, (casual, tile floors, iron and earth tone colors, big on reds and yellows and orange).

The chosen light is a sputnik...I just don't see it.

If you have the name/finish used on the rest of the living area, then paint the dining area the same.

As for the gray ceiling, I like a tray ceiling painted another color. I'd do a blue ceiling and white walls.

Greek and Mediterranean do well together and I found a photo which you could use as inspiration.

Have fun. The house looks great!

Paint it all white like the adjoining space or you will lose the cohesive flow. No to accent walls.

I have not purchased my rug or chairs yet.
This is my inspiration room.

If I paint it all white, do I use the same sheen as the entry and living- flat, or can I change it up a bit for more sheen.

I guess I won’t use the mirror on white wall- it might get washed out. Maybe a painting with color would work best?