I currently have 6 genicanthus angelfish in my 200 and they all get along fine;
2x Watanabi males (though my scenario here is unique in that I have a small male that was added to the tank at the same time as a significantly larger female who eventually turned male, causing the smaller male to become a sub-male, which I didn't even think was possible in genicanthus sp.)
1x Watanabi female (planning on adding two more soon)
3x Spotbreast females (added all three together, after the Watanabi's were established. No fighting between them, just light chasing to establish pecking order)