i currently have 5 angelfish in what we were told was a 75 gal corner hex.. i suspect i've been lied to though, because i did a 20 gal water change the day before yesterday and i took half the water out of the tank.. lol.
Anyway, assuming that it's a 45 gal tank, i have 5 angelfish, 4 that are silver dollar size and Gabriel that is at least double the size of the little guys.
i also use this tank as a grow out tank for my peacock bass.. the angels seem to enjoy the company of peacock bass, at least as juvies..
I think after the baby pbass are big enough to go into the big tank i might get them some other small tank buddies to torment so they don't torment each other.. something colorful... we'll be crossing that bridge later on though.