You can do a simple framed no glass/shade lantern for that area. It would look very nice or with clear glass.

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I favor the shape such as the darlana which was able to upload. A large white shade or any shade there I personally would avoid, just my opinion. Your pendants seem to have a shade or similar in the center so would not want to mimic it.

Another thought would be to install a recess light there and have no pendant over the table. This would let the bar pendants shine like they do and give your eye a rest before taking on the great room.

You could also try using the same pendant you have for the bar to go over your table. If they line up, then you have some continuity. If there is a larger size of the same model as your bar pendants, that may give enough variation should you need it. I do find the round/frosted piece you posted not quite related enough to your bar pendants to be relatable - so either going closer (keep the frosted, add outside framed, maybe make it square) or taking it out all together and using recessed lighting (as Jonn Spradlin suggested) makes the most sense to me.

It is challenging to mix lighting requirements like no-glare and enough light to see with design/style requirements. But you'll find a good fit.

Things in that picture just don't look like the right scale to me. Those two lights over the island are too big, and that table is too small for that space. And then I would not use a shade on the fixture over the table, find one that is just open so there is not as much fighting between it and the kitchen pendants.

I would use one of the lights that you have over the kitchen island for the round table light.

Then, I would go with two smaller lights to go in their place over the island. The 4th picture pendants would be beautiful there, as long as they are small.

We have some great drum shades that might interest you for your dining room table. Here are just a few.

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