Read them all and this one still takes the cake. Would like to add Pelamis Platura and Lacauda coubrina not really a monster "fish" persay but some nuts like Dr. Fry keep some of these but they require a tad bit more than the 200 gallon rule so I guess they dont really count.
The electric eel isn't aggressive by any means it just releases an electric current which makes it deadly if you want mean there is nothing that compares to the power size and attitude of an aimara imo
They're built like a bull and have the strength to match
The only thing that I would put close to an aimara is a giant snakehead but they are illegal in the states
I'd definitely go aimara