I can only tell you the least aggressive of the large angels......In my opinion the Majestic, which I have not found to be fragile like another poster said, Goldflake, Scribbled, Regal, are on the lower end of the aggression scale. I have had all of these. The Goldflakes seem to be very non-aggressive although it does not mean that any of these fish will not defend themselves with another more aggressive fish. I have not had, but have read that the Blueface and the Emperors are moderately aggressive. My angelfish book says the Queen, Ansfer, Blue (not Blue face), and French, and Passer angels tend to be very aggressive. Were you looking for an aggressive angel? Why? The aggressive ones listed need at least 300 gallon tanks when full grown as they get to 18 inches plus. The smaller of the large angels....the Majestic, Regal, Goldflake, Scribbled, can be kept in a 200 gallon. Lesley