Ok guys it has been a little over a week. The black angel hasn't been harrassed at all by the jack dempsey, the jack has not shown any aggression towards the black angel. So I attempted to re add the golden angelfish yesterday during the day this time and everything has gone smoothly. The jack does chase the angel away from her territory from time to time, but everything goes well. I assume thejack gets dark next to golden angel to show that she is the tank boss. I am being very cautious and seeing what's going on in the tank. I am no longer planning to add anymore fish to the tank as I feel that it's well stocked.