Is the top solid wood or veneer that will IMO have a huge impact on how you refinish it.

I would look at General Finishes Gel stains that do not require sanding.

Why do you need it refinished to a black stain? It looks nearly black on my screen. Certainly looks fabulous as is. Not sure I'd go to the trouble (and risk) of refinishing it a shade or two darker. In what way are you completely renovating your dining room?

Use Dixie Bell black gel stain. It's easy and won't make a mess.

The room is black and white. My ceiling is tricorn black. The room looks weird with a brown table. It’s just not the look I’m going for.

The tabletop from underneath appears to be solid wood with wire brush marks (which I hate so I wouldn’t mind them being sanded off)

And in natural light it’s brown unfortunately.

Susan you said you wanted the table blacken? Now your comment ? Confused

Of course it could just be painted black... Most of the RH furniture is veneer, so refinishing could be tricky as all the current factory applied finish has to come off to stain it darker. If you can get a refinishing specialist to come to your house they may be able to tell you if it is even possible.