I'd go for a drum shade pendant. It doesn't have to match, just a similar design.

You didn’t Indicate the height of your ceiling. With an 8ft ceiling it is a challenge because if you will be restricted to a smaller diameter. I only installed two over my 99” island. I wanted them larger in diameter, but the next size would not accommodate my 8ft ceiling. I did not want to use three, I knew that from the beginning. I wanted the lighting to be uncluttered and open. This is what I did.

This is why I always have the electrician run the supply wires in the ceiling, with plenty of slack. We wait until after the drywall is done to cut the holes and use remodel boxes. People can’t visualize. Even when you draw them diagrams. Or, do an actual real completed DESIGN from the beginning, with all choices measured and specified, and SET. Instead of winging it without the ability to visualize. Design BEFORE you do any demolition or building anything. Then the boxes and lights go where they need to go with no angst.

As a general rule, odd number multiples work best. But that all depends on the size of the island and the size of the fixtures. If you want those fixtures pictured above, get two. If you want (3) fixtures, go smaller, i.e. no larger than 8" in diameter.