The dwarf cichlids might work, only I'm thinkin' everyone would be takin' the lower levels--?
I tend to agree with reg2k2 that all the fish being mentioned are lower level dwellers, and you already have the corys -- is that right?
I do not think that chichlids and corys should share a ten gallon. In fact, judging solely by the behaviour of my male krib and what I have read, I'd say a 10 gallon should be no more than a temporary home for this type of fish. My guy can move like lightning, but instead he swims in choppy little movements -- I think he is very confined. He also did not like sharing space with the 2 corys I had in there with him for a few days. He tolerates the two cherry barbs that stay mostly in the mid to upper level, but he chases them out of the lower level and away from the food supply. The cherry barbs are quick to get out of his way, but the corys paid him no mind, maybe dangerous for them. That's why I took them out.
A shoal of tetras will work well with corys (the smaller slim-bodied varieties so you can have more of them). Danios would be good, too, as would a group of small barbs (like Golden Dwarf - barbus gelius). Harlequin raspboras are pretty and petite.
If you want something a little different, honey gouramis stay pretty small, don't need to be in large groups, and gouramis are more gregarious than any of my other fish, although I've read that honeys are more shy.
There are lots of community fish that will work with your corys, I would just stay away from other bottom dwellers and keep a close eye on water quality.
What kind of cory cats do you have?