Advice please: Dividing Datnoid tank due to aggression, introduce in future?

I have a newly introduced 11" NGT into my monster community (170G tank) that is rather aggressive with my fishes, particularly picking on my 12" IT. Those two are my only large Dats, living with a 4" NTT, and 2x 2-3" IT Dats, large clown loaches, 17" Tigrinus, 8" Flagtail.

I have now divided the tank into 1/3 and 2/3, with the NGT living with a 6" Frontosa, 9" Ansorgii, 2" IT DAT in the 1/3 section. I realize this is a temporary setup. I was wondering if reintroducing the NGT into the rest of the community after a "Time-Out" period would help would lessen his aggression in the future? Any experiences out there? Thanks in advance

Thanks Ade! U are always helpful. I'll keep u updated on the progress, and will keep it up for 3-4 months as long as the Ngt eats and is healthy. This will also allow all my other Dats time to grow and heal up. I've read the color blue calms fish, so may remove my black back.

Anyone else with suggestions?