To keep the symmetry my one and only idea is to put in 2 "Fan Chandeliers"

Rules can be tricky, because it really depends on the chandelier, for example, does it have a small metal part in the middle or any crystal pieces which hang lower than the majority of the chandelier? We like to be able to see underneath the main part of the light fixture, when standing beside the table - if for example you were using the dining table to serve buffet style... or for a wine tasting. It's best not to cut too much of the electric wire or chain until you're sure you like the length. I hope that helps?

Pendants seem like a better geometric fit.

no matter fan is far away from dining just add little bit extra rod to give it fall from ceiling from dining top 4' gap is enough for ceiling drop lights you can get these online or ikea hope it helps