I have 8 Black Phantoms and they are great, only had them about 6 weeks but they settled right in and are always displaying to each other, they certainly seem hardy. Glowlights are hardy in my experience.
In my opinion pretty much most tetras you can buy at fish stores are hardy with the exception of the neon group in new tanks. Black skirt tetras are very hardy but the can be a little agressive to tank mates. Black phantom tetras are very hardy. Just remember any tetras you get need to be kept in large schools.