The last pic shows an acara to me. The second to the last is a Tilapia buttickoferi? Hard to say what that one is. If you must add plants, then you will have to get rid all those cichlids you have. What plants do you plan to put there?
A few gars, arrowanas, armatus, african tiger fish, tigs, bichirs and on and on...large pacu's or pirrahnas..gulper catfish peacock bass. I wish that was my tank. Id get a few new fish a week.
Wow that tank is insane nice, as far as the fish that you posted in pics i will give it a shot, last pic looks like acara, 2nd to last and 3rd to last look like same fish i would guess convict 4th pics 2 oscars and not sure but guess blood parrot? Great setup though, thats what dreams are made of lol