Am I overloading my tank?

Hi, I'm currently stocking up my 75 gallon fish only tank, for now because I'm converting it to a reef tank. I wanted some opinions on if I'm over loading my tank or if I will be okay once I have all the inhabitants I'd like, the tank still looks a little empty since none of them are really that large. I currently have 6 fish in total: Tomini Tang, Singapore Angelfish, Tiger Watchman Goby, Coral Beauty Angelfish, Six Line Wrasse, and a Firefish. Currently all of my fish are getting along and have been doing great, a few have already been in my system for 6 months. Now, I'd really like to add just 3 more fish to the system being one pair of clownfish and one Schooling Bannerfish. Would I be fine adding these last three fish? My research shows they are compatibly so just wanted a second opinion. Thanks!