A Botia is the type of fish I was thinking about. Sorry. That might be a good idea.
Still probably won't work (Clown Loaches are a type of botia). Maybe some of the smaller breeds, but botia/loaches can have tricky requirements. Depending on the type you run into the problems of size, activity, or water requirements.
Kuhli's are about the only common loach breeds I'd suggest for a 10g.
Tiger Barbs are gonna be tricky in there. A bigger group will be needed, but a bigger group would really be pushing it for that tank. They are rather active fish also, so a 10g isn't really ideal. Not that the 3 won't work in there but depending on the personality of the individuals, it could limit what they are willing to live with. I've never had a problem personally with them fin-nipping, but they do have a reputation for doing it a lot.