In Cenotes where you would find these Parachromis (yellow jackets), you would not normally find JDs, because they are much too sensitive, and not equip to handle the general Parachromis aggressive tendencies, even in thousands of gallons of space.
And as said above, these Parachromis come from much more mineral rich environments than Oscars, and are also pussy cats in comparison.
That size tank may be perfect for a compatible pair of Parachromis, without any tank mates.
Being primary predators in their natural environment, resources usually limit their numbers, compared to omnivores.
Below a video I shot in their natural habitat, you will see a few throughout, mostly young ones, the adults spend daylight hours in lower depths.
An adult female shows up at about a minute
JDs usually suffer when in combination with other more aggressive cichlids.
In the video below, JDs are the dominent cichlid, and do well in combination with non-cichlids like large mollies.
But below a video where they share habitat with other cichlids, you can see they are a bit torn up, and their population is very sparse compared to the 1st video.
I usually base community combinations by what I see in nature, but because of tanks tiny size, in comparison,
what works in thousands of gallons might not be realistic in aquaria.
In nature you see tons of fish like tetras and live bearers, but in a tank, these small fish are too easily corned by savy predatory deftness of cichlids.