Coral Recommendation to neighbor Duncans

[ScubaSnacks]

I have a vacancy that I'd like to eventually fill on my 40B that I'm slowly stocking. The rock has a crevasse between the bottom section where I've started a Duncan garden and the top section. Par is somewhere around 100 and flow is low to moderate. Below is a picture for reference. Any thoughts on a coral that will play nice (but maybe inhibit growth) with the Duncans and look good in this spot? Alternative is to grow the Duncan garden but it might look a little one note. TIA!

 

[Kasrift]

Zoas would work. Neither can sting each other and the Duncan's being taller should be able to shade out the zoas to keep them from overgrowing the Duncans.