Very cute goldies, although I think it is a bad idea to mix them with an angel fish.

Angel fish can be aggressive by nature (don't say that yours is different) and will most likely start to nip at the flowing tails of your goldies.

My advice is to see if you can re-home the angel and lower the temp for your goldies, so that everyone is happy and healthy.

How big is your tank? You should look into getting a few live plants for them to munch on!