I like the dedicated whole house dehumidifier option for treating incoming OA. If it also connects to RA then it will help reduce the latent load on the AC.
Another option mentioned above in some of the other posts that I have used is the mini chiller system. On the surface these do not appear as efficient as say the VRF minisplits (they look identical by the way), but they can allow for greater diversity for greater possible equipment size reduction. Only water and maybe some glycol (not a very high concentration in your area, I imagine) run through the building so the refrigerant charge is all outdoors so that code restriction of accounting for refrigerant dumping goes away. Installation can be done more easily because it is water piping and not refrigerant, many more contractors can do that kind of installation as certification is less stringent. Well suited to new construction. Same other problems as VRF with condensate disposal. Worth looking into though.