The Foxface might be okay in the smaller tank, but they can usually hold their own, even in an aggressive tank. My concern would be the Koran. They are already a semi- aggressive fish, but it will eventually need a much larger tank (250g). Putting a fish like that in a smaller tank is going to cause problems. Angels can be territorial and when they are in a smaller tank, more of that tank is seen as their territory. Even if this angel is a juvenile, its in a tank half what it should be....it probably feels the whole tank is its territory. IMO
, it could easily decide other fish are encroaching on its turf and start bothering them, even if you moved the Foxface.