Sorry about the foxface but also a 70 gallon or larger! I've seen some huge foxface's!!
And you can get an dwarf angelfish in the 55
But they are all reef safe "with caution" so if you buy one from your lfs
ask where he came from, if it came from a previous owner it's probably because it was nipping at corals and if it came from a distributor it could still possibly nip at corals, just all depends on the personality of that exact fish