ignorance

Hello there, I need some help with my tank, I bought the set-up as is from someone about 3 months ago, before this I only had a small tank with tetras and guppies. This tank is 55 gal and hosts 2 jewels an albino cichlid of some kind and what seems to be a convict cichlid. Also a 6" plecostomus...

Can you have a EA predator tank or is the aggression too much? How does it compare to larger CA/A cichlids? Do any of you keep a predator only EA tank? Are names including Tyranochromis just names or do they truly speak to the aggressive nature of the fish? Gracias para mi educacion!