I personally do not see why not. I kept 7 Discus in a 75G Tall tank for years. Angels are Cichlids - with all the good and bad that that entails. Once they decide to breed, all bets are off and you might want to have a Plan B if things become too ugly.
Courtesy * Integrity * Perseverance * Indominable Spirit * and Self Control
Tenets of TKD