You can try housing two or more large cichlids together in the 200g, but its not guaranteed to work, especially if the cichlids are introduced as older specimens (rather than youngsters).
Things may go swell for 6 months or 2 years or (whatever random amount of time), but one day you may come home and find some dead fish.
Large CA cichlids are all of similar temperament, but that does not mean they hold truces; pecking orders are almost always the outcome. And what essentially happens is that every fish in the tank is at the mercy of the most dominant fish, and you cannot count on the dominant fish staying perpetually merciful. There's no telling who would be the dominant fish in your aquarium, as all fish regardless of specie have varying personalities.
If you're willing to take some risks, go for it! If you're not willing to risk casualties though, then I'd keep the 200g limited to 1 large american cichlid
african cichlids (excepting tiliapia!) would be excellent tankmates for your hatiensis, though. You could add 10-20 of them, depending on the species you choose.
