Coral suggestion for with high flow sand bed

[Project]

Coral suggestions!?

I have empty spot in front of the left corner where it gets most flows in the tank causing bare bottom.

What corals will be good here? Bottom left

Tank is 18” x 18” cube.

For the flow, I have two hygger wave maker running at about 50% max (about 800gphx2)
And return at about 300gph

 

[ReefStable]

That would be a good spot for an encrusting or smooth skin Monti! They don't need a lot of light and love the flow!