RDs are nippy instigators so I would have to say they are always looking to pick a fight.
Convicts are small so they try to bully, bite and chase everybody and ounce for ounce they are high up on the list.
Buttikofferi are capable of dominating and destroying anybody and everybody in the tank that is within the size of it and smaller.
Jags are strong and they are hunters but I don't think they are really aggressive unless they are spawning (they don't have to be since everyone pretty much gets out of their way because they look big and mean). From what I understand Dovii is pretty much the same . I hear they are nocturnal hunters , very smart , and will not attack anything they don't feel they can take. Once they have caught up in size they will wait for the moment and attack, ripping the stomach open first and then finishing the rest.
Green terrors - I find them pretty mellow.
Any cichlid kept in a tank that is too small, crowded, in the company of too many other terratorial cichlids , without enough structur and hiding spots, poor waterconditions or spawning will usually act a lot more aggressive. Cichlids are also very individualistic.