Your pH is a little high for barbs although they might adapt with careful acclimation. Tiger barbs are known fin nippers and should only be kept with fish that can get away from them. Keeping the barbs in a group of about 5-6 seems to mitigate the problem as they stay busy chasing each other.
I think most of the gouramis would do OK...also with careful acclimation. Although (according to my references) the pH you listed is within the acceptable range for gouramis, they will most likely be kept at or near 7.0 at the LFS
hence the need for slow acclimation. Be warned that the larger gouramis can sometimes be very aggressive...especially if you have two males.
Since you already have moderately hard water, have you thought about some of the smaller varieties of african cichlids? They thrive in very hard water with pH about 8.2.
Another option, if you decide you want to keep fish that do better in softer, more acidic water, is to mix distilled or RO
water with your tap water to get the desired hardness and pH.