I've kept both together with no issues. I find them to be very peaceful fish. Nothing like adding a new tang to an established tank with tangs. I would give it a try. The 2 barred are one of my favorite fish, lots of personality. When I had my first tank, I used to have a 2 bar that used to eat out of my hand, it was awesome. Give it a try though, I don't foresee any issue IMO