Your parrot fish, do you mean Blood Parrot or the true Parrot cichlid? Both of those will get to a decent size so your tank stock is pretty much full already.
Here's some suggestions anyways. Most Geophagus species are peaceful, exceptionally beautiful, and don't get too large so they might be a option. Severums are another group that's not too aggressive but do get to decent sizes though.
All in all if you decide to not go with none cichlids maybe some Clown loaches(I love these guys).
Neets are little hellbenders when they breed. I remember having a pair in a 90g with a 10"+ male Midas and everytime they breed they would take over more than half the tank.