What kind of top swimmer fish should i have with 4-5 tiger barbs?

tiger barbs need a 20 gallon minimum, they need to be in schools of 10 or more in a 30 gallon tank or larger if you want to keep them with other fish, or they will be very aggrissive and stress out other fish. corycats are schooling fish and need to be in groups of no less than 5.