I would say no. I don't know the chances of them pairing up, but if they don't pair, it would be a life of relentless torment by the dominant one.
I had a coral beauty and a flame angel in my 120, and the flame chased and picked on the coral beauty until she jumped out. Then, the flame turned on my clowns and harassed them until I could net him, which wasn't easy at all. Maybe I had a bully flame angel, but I've since read that pygmy angels are extremely difficult to put together without temperment issues cropping up.
Plus, there's always a risk that a pygmy angel may nip at corals, so adding another would be rolling the dice, IMO.