I think if you slide the mirrors a bit toward the middle, and leave room in the middle, you could do sconces on either side of the mirror and a sconce in the middle. Look for a sconce that has thin vertical lighting. I've never like lighting over a mirror. We look much better with side lighting from both sides. Are these mirrors medicine cabinets? If they are then plan carefully for the opening of the doors to the medicine cab. I will take a picture tomorrow and show you what we did. We may have a bit more room than you but I think it would work for you.

Depending on your bathroom layout you can use some ambient lighting. See below a couple of examples if you like modern. Let us know if we can help designing the perfect lighting fixtures for your bathroom. sale@galileelighting.com

Correct that (can’t see how to edit my post)…vanity will be 60” NOT 72”…mirror and vanity bar size suggestions?

I love your grey colors. Here are some ideas for your space. Give me another here are some examples with the backsplash. You said you were going to paint your vanity gray you can change to a silver hardware.