not many people are good at keeping dwarf gourami's so don't worry about it, they are bred for their colour with not much consideration for their health, so because of this not many live a very long life.
honey gouramis are small and very attractive, as are chocolate gouramis but these can be quite temperamental when newly introduced. or there is the bigger gouramis like opaline and golden which are nice but i think they can get problems with their temper!
tetras, well i have always loved congo tetras, not the cheapest of fish but very attractive and make a stunning shoal!
have you looked into any of the rainbowfish? the dwarf neon rainbows are nice (praeox rainbow)