Some ideas ...

Search on Houzz photos and you can find examples of these in homes.

This one comes in several sizes. I have the small one in the hallways throughout my house.

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One challenge I have is a lot of vertical space to fill but with a sloped ceiling, the type with multiple pendants stemming from one base will not work.

Cedar & moss has some great ones that work with sloped ceilings. Just an example:

You have a nice place.

I don’t think you need to fill up the vertical space. Generally with high ceilings, eye level is where the decor focus is. There are exceptions, but I think you can just go with a light that is stationed in and illuminates the immediate area.

Lighting is very personal, so you will know it when you see it.

On a quick search, these caught my eye.

https://vakkerlight.com/products/bombori-pendant-lamp?

Centered and hung lower. Which one? This is a super personal choice. There are thousands to choose from. You'll know it when you find it.

Do you have any other chandeliers or pendant lighting fixtures in your home? If so, you could consider coordinating with those if not matching them outright.

Align the table and light for sure. A rounded fixture makes sense here. simplynatural’s suggestion is good with the window, the southwestern art, and the chairs.

Important decisions include proportions and height and suggest adjusting the plants so table can be centered under the light. Style wise, there are endless options, but look to enhance the space overall and I think black would work well (chain‘s length/cord will most likely need adjusting). If interested:

https://www.monulo.com/products/quillan-industrial-large-black-drum-pendant-light-for-dinning-room?variant=44784193732766&pins_campaign_id=626758205582&pp=0&epik=dj0yJnU9VTRWeVlud2Z5R0pBRnJySUJ4QUZEVFA4R2gyTHJfTFMmcD0xJm49X1pvZDN0a1lYbzc0X0hRVFRCQllEdyZ0PUFBQUFBR240aV9j

If you don’t want to break up the sight lines, consider glass with some black and rust, which will also tie the space together. Consider cleaning needs of glass.

Imo, black fixture will look too overbearing. You have dark kitchen cabinetry. Go with something light and airy as simplynatural has suggested

Can you center the table under the fixture? Looks like you might have to move the plants some This is what we have, similar to the Nelson pendants. Nice soft, non glare light.

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A sputnik type light is a good choice for your style.

These are just showing different wall color options:

How big of a deal is it to have an electrician move the placement of the chandelier? if the fixture is moved am i stuck with sime kind of weird celing box? similar lights are in weird off center spots in a few places in this home-moving the table eliminates one path to the backyard……but this isnt the only place where this is an issue.

A simple swag hook will fix the off-center, however with the way you are using the room as a terrarium, maybe you should look at track and rail lighting and then just hang a pendant from that. That would also allow you to have lights directed at the artwork.

Wicker would add some texture. Here are a few ideas.

I think one sort of the look from freedom but in a nice glass but echoing the curve of that window which really drives that IMO

Yep, I'm with @RedRyder ^

a natural fiber drum shade to compliment the chairs and blinds, it brings a bit of warmth to the modern feel of the space.

https://www.wayfair.com/lighting/pdp/everly-quinn-20-handmade-woven-rope-drum-chandelier-w117612572.html

Hang it at the header trim of the door, so it doesn't cover your wall art.

Same height as your existing fixture.

West Elm...not too heavy, compliments table top, chairs and art.

Arrange the floor plants so that the table is directly under the light.

With that ceiling height, I think you can go considerably more substantial than the fixture you have now. The current chandelier feels a little lost in such a tall space.

I’d look for something with a longer vertical silhouette rather than a very wide, heavy fixture. A glass chandelier could work particularly well here because it would fill some of that height and create a focal point without visually blocking the room or competing too much with the architecture.

I could see a Murano-inspired glass chandelier working beautifully — something elegant and sculptural, perhaps with clear or softly warm-toned glass rather than a lot of dark metal. I’d also hang it lower than the existing fixture so it feels connected to the breakfast area rather than floating near the ceiling.

I recently featured a Murano-style glass chandelier in a video about five timeless luxury pieces, and it’s a good example of the type of vertical, decorative glass fixture I’m imagining here:
https://youtu.be/PoZYuVMbVXQ

The chairs and table are not large. The fixture should not overwhelm the furniture.