Harlequin Tuskfish, tank mates

[rbja]

Hi I can use some help.

I have a seven year old Harlequin Tuskfish that has been the only fish in the tank now for close to 2yrs maybe even longer .
I was wanting to add maybe at least 2 more fish to the tank.
So my question is, what would be the best 2 candidates to go into the tank with him? Knowing he's going to probably be aggressive. Since the tank is just his.
Tank size is a 180 gallon.

Thanks for any help.

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[rbja]

Forgot to mention it's a fish and live rock tank only no coral

 

[griss]

@Dr. Reef will likely have some good suggestions.

 

[Dr. Reef]

Harlequin will be aggressive towards any new additions unless and no guarantee, if the new fish are larger in size.

 

[griss]

Harlequin will be aggressive towards any new additions unless and no guarantee, if the new fish are larger in size.

I knew you’d have good insight