How to make a sprite be on top of another if it is in front of it and behind if it is behind?

Question

Unity

Example in the illustration:

At the moment, I see such a way out - to dynamically change the Order in Layer for all objects, so that those to the south (lower) have a higher priority. There will be about 800-1500 stationary objects and less than 100 moving objects on the location at the same time, and there will be no change in the camera's viewing angle or its rotation.

But maybe there are better solutions?