Yes.... quite the pecking order at that. If anyone has tried to mix larger tanganikans it gets complicated because they establish a large territory. The calvus is on top, and in descending order Pulcher, Meeli, dhonti, Chalinochromis sp"Ndobhoi" and the julidochromis last.
There is a trick I use that works 3/4 of the times. Add one fish at a time based on aggresiveness and size and let them establish territory first. Then add fish saving the most aggresive for last. Once a fish establishes territory it usually keeps it. No problems yet.