opinions on stocking

[Baldy]

Hello,

I have a 75g with a 20g sump that I'm looking for opinions on as far as stocking. I have currently:

1 Foxface
1 True perc clown
1 Oscellaris clown
1 Blue green chromis
1 Matted filefish (recent addition)

I'm thinking about adding a flame angel in a couple months or so, and possibly a Pakistani butterfly later as well.

What do you guys think, would that be overstocking?