Mike, you have a 80 gallon pond with no filter and 7 fish on it (mostly koi IIRC). Your fish are not just scared, they are dying. Adding more fish to "clean" the pond or to "calm" them will only accelerate the process, as any fish will contribute to ammonium production which will kill your fish. The only way they will get calm is by floating upside down, dead.
You need to give those fish a habitat they can survive in, and that means (ideally much) bigger pond and definately, sufficient filtration. Without both they will always be stressed and sick in their very short and miserable lives. Dont buy any other fish, start digging and building a skippy filter or similar. Meanwhile, do daily water changes of 10% or so, assuming your tap or well water is fish safe. Use dechlorinator if you fill with tapwater.