Smaller cories, like pygmy cories would look great in a 10 gallon along with a few neons. If you can't find pygmy cories, any other species would work but you would only be able to add 3 or 4. Do not add more than 2-3 fish to your tank at once. Please cycle the tank and purchase a liquid test kit for ammonia, nitrate and nitrite before adding any fish. Try aqadvisor.com/ for stocking suggestions.