In nature JDs share habitat with mostly molies and catfish, sometimes Thorichthys and do very well.
Although they are considered by some aggressive, that's on an old school community of angels, gouramis, live bearers scenario, not on a community of aggressive cichlids type scenario attempted these days.
When Rocio (normal JDs) share habitat with more aggressive cichlids, they tend to suffer, IMO a managuense would not be a good cichlid to share a tank with a JD, or would any Prarchromis type.
Below two videos I took in a couple Cenotes in Mexico where JDs live.
In the first,, they are practically the only cichlid, and do well, because they dominate.
Eden2
In the next video, Mayaheros uropthalmus are the dominant cichlid, and as you can see the JD population is much smaller, and the ones that are there, are quite a bit torn up.
027 zps4b102ffd
In the 2nd Cenote there are thousand gallons to divy up, in the first video, perhaps a million gallons of available space to divy up.
If your tank is 300 to 500 gallons a Parachromis might work
Now a video where i didn't see any JDs, but there were Parachromis, and invasive Tilapia.
Aktun Ha