tang police...arrest me

So my yellow tang who fed off the cone from my powerhead occasionallly got stuck on it two weeks ago and luckily survived, so I cleaned it off and unfortunately was not able to survive it last night. Had him for 2 yrs, sad to see him go so now looking for a replacement. Currently its a 120g mixed reef 4ftlong tank. In their is a tomini tang, niger trigger, clrownish, and six line. The sixline is somewhat territorial but I think that was in relation to another wrasse that I shouldn't have tried to add. Would like to add another tang, didn't know if any others would work beside the yellow or yellow eye tang, can't think of his real name, any other fish suggestions welcomed as i am aware a 4ft tank limits me. Thanks

 

Any smaller sized tang that does not have the same body type as the tomini should be fine. Sixlines are territorial period once established. Your tank should be large enough that the sixline shouldn't be too much of a problem.