New 20 gal long

[Aquaman19]

Getting ready to set up a 20 gal long.  Any ideas of some cichlids that won't overgrow the thing?  I like to breed as well so some ideas would be nice.  Was thinking of rams but would be open to other ideas.  This tank is at work so I have access to RO water as well as tap.    Got plecos planned for the bottom dwellers.  Would like to have live plants as well sooo if there are any plants that would not get ravaged by the fish those ideas would help too.