I think a larger black tone lantern would look great. You have only a single light box.. I wouldn't do three. I would personally do one or two decent size lanterns left and right. The size and width of the island would need to be known if you are hanging multiples.

Many different lanterns out there in black. I favor the Darlana by Visual Comforts. It's very well made and has more straight lines than the mock up above. The iron on the one above across the top each piece is slightly rounded.

This is Darlana however obviously showing in the gold tone. It's available in dark, gold and silver tone.

With a lantern the ceilings will need to be fairly high.

You would also want to hang the light lower than the light you currently have.

If you are in need of more lighting in the space this will provide a lot of light. If you go with a lantern I'd place it on a dimmer.

If you want a down lighting on to the island another light you may like since the room is wide open us a larger metal cone.

https://www.rejuvenation.com/catalog/products/nina-24-cone-pendant/configurations/ob-and-matte-black

Thank you so much. We are moving in on Tuesday so I don't actually know what direction I need the light! I'm going to live in the space for a little while before deciding. That was very useful advice.