Well I would say first pick if you want breeding or a community, becasue thats too small of a tank to have both comfortably.
Granted its possible, but one of the 2 will suffer.
You could put mild sa/ca cichlids in there, maybe a nicaraguense, severum, green terror (hit and miss with aggression), Jack dempsey, firemouths (all bark, no bite), and maybe some different types of geophagus (You will have to do some research into particular types and see what your LFS has to offer).
You could mix and match those and it should work out well. These are just some common cichlids that you can find almost anywhere.