Is there a certain color of metal you would like to use?

Have you looked for inspiration on line…it might help narrow down a style. If interested, search “traditional chandelier“ on Pinterest. Also keep in mind size and height recommendations.

I would choose something that shines onto the tabletop rather than the ceiling. This is more rectangular like the tabletop still elegant but not as formal.

https://www.wayfair.com/lighting/pdp/madison-park-elegenza-6-light-chandelier-htn10031.html?piid=106588732

The mirror on the wall and lamps are antique satin brass

I'd keep the satin brass connection to your mirror and lamps, but simplify the shape: a clean six-arm chandelier with small linen shades would feel less dressy without fighting the table. I'd skip crystal and ornate scrollwork rather than switch metals just to make it casual. Since you see this room from the adjoining spaces, check the fixture from those doorways too. I'd start around 30–34 inches above the tabletop, then adjust for clear sightlines.