The Geophagus group you might find on that side of the Andes and Sierra Nevada Santa Marta mountain chains, although a bit further north, would be the red hump group (steindachneri, pelligrini, or crassilabrus).
These Geos are also more adopted to an alkaline environment, that suit Andinoacara.
Other cichlids might be Mesoheros ornatum/gephyrum, and atromaculatus.
One of the problems I have with an open forum such as this, is that an opinion can be given, and hold weight, but from very inexperienced posters.
Someone might say, I have had great success with pearsei in a 55 gal.
But they may have kept, and withheld the fact that they have only had those pearsei, 1 year or less. This "IMO" is not experience, this info means nothing. Unless you have kept a cichlid at least the length it takes to reach full potential (usually minimum 3 years), and to full size, that is not experience but just the beginning.
I have seen posts by people that can't tell a JD from Paratilapia. Or a Tilapia from a Parachromis.
I realize we all start from scratch, and it takes time, but voicing opinion after very little time is not to me productive.
I would never comment about a cichlid I hadn't kept for at least juvie to adult stage (sometimes years) at some time in my life. And for those cichlids I haven't kept in over 20 years, I resist a rash opinion.
Thanks I am always looking for the best help I can get from experienced keepers such as yourself. I would rather get it right the first time then have a problem. Thats why I am taking every suggestion with a grain of salt.
Would you have any suggestions for the SA tanks with the green terror, Festae ?
also a CA tank with a JD? I would really love to hear what you would come up with