I agree with Jaysee. Two DG, even if it's male and female, are not at all likely to do well in that size & will more likely stress the other to death, rather than mate.
However, I have two honey gourami (
not the same as regular dwarf gourami, or the golden gourami) in my 12g; they are beyond docile and they max at 1.7 inches. They are great together! They're both males (females are about impossible to find), but they show zero aggression to each other or to the gups, oto, or snails. If the tank is heavily planted (even with fake), then they will
eventually feel safe and will come out all over the tank and be super cute. Mine are bright canary yellow with bright orange tips along the edges of their fins. (They will look really dull in the store, but they super brighten up with proper care and you'll really notice the orange flame in them.)

Well, that's just my opinion and I'm clearly biased toward the little guys,

but they seem like the perfect fish for a small tank.
GL!!!