Figured I’d add rainbow cichlid. Nice for a cichlid, but still a cichlid.
Also, if we want to count inverts, crayfish dominate the bottom(at least think they do).
This on the rainbow cichlid! Mine is fiesty as hell, very independent and tries to push my acara around (it doesn't work, lol). He rams and intimidates the much larger synodontis catifishes by popping them in the head.
I hear sajicas can be little terrors, too.