Have you seen chili rasboras? Boraras brigittae. They're awesome nano fish with personality! lol Two platies in an 8G is kinda overboard already IMHO because of they're bioload. If you do go with corys, definitely go with pygmy corys.
Yes, I agree that I am pushing it with the 2 platies in terms of bio-load. I may keep them as is for now and probably not add any more fish. I'll see in a month or two and maybe try some cherry shrimps.