Plants and driftwood. Anubias, java ferns, tall grass like plants, surface plants. Sand substrate. Lots of fish found where polys are. Most likely available will possibly become food for your endli and ornate. Larger things like ctenopoma would work. Kribensis, puffers, other cichlids lots of cats mostly synodontis sp. Some of these may be compatible others too agressive, yet others will become food sources. Sens are probably in danger. Others have done it, I'm not an expert and I don't know everything but it's a good possibility as
Polyaddict86
pointed out.