I mean this is a relative question because it's difficult to compare. I have kept quite a few species and I would say they are all aggressive. Lugubris group in general is aggressive. Among Atabao I , II, III the III I have observed most aggressive .
If you are planning to get one please read about aquarium size , other fish and their size and hiding places. And get only one pike unless you ha e a very large aquarium.
Truck is to get a juvenile or two and raise them together .
Balancing act it is .