I have six angels in a 55 gallon with a pair of clown loaches, a pair of dwarf gouramis, 3 neons, a common pleco, 3 raspboras, a pair of pearl gouramis and 4 guppies. That is a lot of fish in the 55 gallon, but 4 of the angelfish are juvenilles I am planning on moving them to another tank as they grow. Of course I need to buy another tank!! I would follow the "1 inch of fish per 1 gallon of tank" rule. I try to roughly follow that and leave about 6-10 inches free, just to keep the tank cleaner. In other words I have about 49 inches of fish in my 55 gallon tank. I have had good luck with angels and most community fish, just make sure there aren't any major differences in size - big angels other tiny fish or tiny angels and other big fish - and you should be fine. Also, make sure you stay away from any "semi-agressive" community fish, like some barbs, as they can be fin nippers. Good luck and keep us posted!