I recommend a Texas and a Jack Dempsey,they are pretty laid back and they usually wont take sh*t from other cichlids,if they feel threaten.Oh also to clear this up a bit on my end,make sure you get a Carpintis those usually grow 10 inches the most,as for JDs,you can have in the tank for more than a year honestly,they grow about 6 to 7 inches in 1 year,then grow quite slow,compared to Oscars,Midas,ect.