I believe in 90 % of cases, argentea (especially male(, should be kept either in pairs with a comparable female, or alone.
To start, they "hate" any other similar shaped silver species, after that, unless the tank is over 300 gallons will try to take out any cichlid similar is size.
My argentea never bothered with small dither types, but killed any other Vieja, Paratheraps types, and after they were gone pinned a much larger dovii, and managuense in corner of a 6 ft tank .
In nature they are loners living in streams with a strong flow and drive out any other similar shaped cichlids from their territory.

maculacuada can be equally as aggressive.
It may work if you have a 300+gallon tank, because each species needs a much larger territory than their size suggests.