I haven't noticed flame angels to be more aggressive than any other dwarf angels. Adding the angels simultaneously can cut down on aggression. If you plan on corals, bicolors are some of the worst offenders for nipping.
Other fish options could include flame or longnose hawkfish, starry blenny, a fairy or flasher wrasse.
Other fish options could include flame or longnose hawkfish, starry blenny, a fairy or flasher wrasse.