Just an update.
So far so good. I've had to move the smaller of the larger angels to a friends house, it was getting smacked around a bit and was starting to look a little rough so this leaves 3 large and one small (the other small one didn't make it. I think it didn't tolerate the last water change to well) aside from the Corys, mollys, and the Plecostomas.
Today I noticed what I think is eggs on the back glass (small whitish round things stuck to the glass) not sure who put them there though. How large do angels have to be to start laying eggs?