Will adding a second angelfish create aggression in my community tank?

I have a community tank (platys, guppies, danios, a rubbernose pleco, opal gourami and one angelfish.) I kind of want to add a second angelfish but not sure if it will upset the balance in the tank - Right now everying including the angel get along perfectly - I have not had a fight or a death in at least the past five months - Will a second angelfish change things?