this list is pretty good, but I would not do a Red Terror/Festae with those species, and I would be very cautious about either sex of a Green terror. The Bolivian Rams will probably perish, I couldn't even get mine to thrive in a tank w/ a Gymnogeophagus balzanii and EBJDs half as big as the Rams.Sticking with one or the other is wise. For an SA community, I'd look at some these to start off:
Crencichla zebrina
Wild-type Oscar
Green Terror male
Threadfin Acara
Blue Acaras
Bolivian Rams
Biotodoma Cupido
Chocolate Cichlid
Green Phantom pleco
Red Terror female (maybe)
If I was going to "cheat", I'd do a school of Roseline "sharks" because they are beautiful and look like a SA fish to me anyway, kind of like a bigger/better pencilfish.
Eliminate those 3 species, and you might be onto something here.
Also, Knifefish should not be kept with Cichlids or toothy fish in general. They're a target for aggression and cichlids can't resist nipping at their fins, which easily become infected. I would vote "NO" for the Knifefish