jaguar cichlids are not all that aggressive. Piranha (depending on the species) and wolf fish just sit there and dont do anything until fed, pretty boring if you ask me.
Depending on tank size and what kind of aggression you want
i would go with Dovii, Midas, Red Devil, Flowerhorn for the larger common cichlids, Convicts for small. With which the majority of these fish will bang the glass at you and kill tank mates.
Bowfin, or bass (large mouth or peacock<~which is still a cichlid but a little harder and more expensive to find) for feeding agressiveness.
I would mention snakeheads but they are illegal in the states so i (and others) really shouldnt give a crap about them cause they will probably never have one.