I have kept/been keeping a pair of motoro, 1 x senegal, a pair of ornates, 4 uaru (poor man's discus), 13 redhooks, with no issue on an 8ftr. I have to let go of the uaru, senegal and redhooks since it became overcrowded as they grow to maturity and I didn't have the budget/space for a bigger or extra tank.
the current pair of motoro and ornates are on the adult stage and still living without issue. The motoro seems to be pregnant and i have plans to move the ornates out for a project early next year.