Keep in mind that a spawning pair of myersi will likely take over a large portion of the footprint of that tank. It may seem improbable, but I have 8 - 10" Heros pairs who claim 4' x 2' of a 220g, leaving all their tankmates pushed into the remaining 1/3 of the tank.
My concern if that were my tank is that I would have 10 eartheaters ranging from 6 - 10" all trying to occupy the mid-to-lower level of the aquarium, and potentially crammed into 1/3 or 1/2 of the tank if the myersi spawned. I think it's doable, but the wild card is the pair of myersi. Spawning cichlids always throw a wrench into the plans.