There are many other South American cichlids like the Apistogramma sp.
The lots of rocks and plant destroyers you speak of sound like African Lake cichlids.
There are cichlids from African rivers like the kribensis that are lovely in planted tanks.
Angels are cichlids,they don't need rock or destroy all plants..
I am sure others will have great ideas also..
On a side note do you get your rams from a big box pet store ?
Have you ever thought of getting rams from a good breeder ???