How big is your tank? If your angel needs a new home, I would start with my friends that keep fish. If nobody has a home then you can check with your LFS
and see if they will take them. Not a chain store like Petsmart or Petco...they wont. Mom and pop stores often will but might not give you anything for it. If they do it is usually store credit and a pretty small amount for the worth of the fish. As far as tankmates...depends on the size of your tank. Need more info to help.