Are you on a slab? Can plumbing/venting be moved? If range hood can be vented from the other wall, here's an idea which gives you more prep space where it's needed, beside the sink. I like a clean-up zone be outside the prep triangle, but the island line-up could be flipped to put dish storage closer to the fridge and DR, but then the trash pull-out might be too far from the fridge. The plan incorporates one of the support posts, but the other is floating, with enough space between it and the island to slide by the third seat.

If you want an entry to the DR, it could go to the left of the fridge, but that would decrease counter/pantry space. Another idea to increase storage would be to enlarge island to incorporate the other post, with cabinets under the seating overhang, for seldom-used items. But--anyone seated would need to walk around the post and base cabinets to access the fridge and MW.Island layout flipped:

NKBA guidelines

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