The dollars will b ok, the angels not so much. They won't be nipping on their fins or anything but silver dollars are fast moving swimmers and get scared easily, i have them in my tank with my angels and their pissing me off cuz they keep scaring my angels and stealing their food. i have to hand feed my angels just to make sure they get their share. With angels u want some other slow moving fish. Other then that they will be ok no one will attack the other or cause them any phisical harm, just that the angels will always feel stressed and alarmed and won't be feeling as settled in the tank with the dollars in there.