Green terror vs Jack dempsey

[Lkeizm]

Got my 200G tank coming next week and currently in my 75G i have a 5.5" severum, juve flagtail and a juve datnoid,

Im looking to add an oscar to the 200G a juvenile one

and trying to decide between the jack dempsey or the green terror, keep hearing mixed things on these fish's aggression levels
whatever one i add will be a juvenile or could i add both to the tank as juveniles?

and maybe get some dither fish bala sharks/tinfoil barbs?

dont want to have major aggression problems even that if it means picking 1 or the other to go with the oscar and the other fish

 

[Rocksor]

I find green terrors way more personable, almost oscar like. The aggression of jd or green terror is about the same level as an oscar.

I wouldn't bother with dithers, you will have enough fish in the tank.