nice looking male!!! i would not put anything else in the tank, if you going to add a female be prepared for lotsa fry and running a divider 90% of the time.
my wild caught are together for about 3 days out of 30 or so. just long enough for them to get the job done, divider back up. male jags are hard wife beaters.
That's a very nice looking jag you got there. I would just keep him by himself. I used to have a pair that was in a 75 gallon a few years back and he would beat her up and everyone else.