I've got a young blue gourami in with Danios and Cories (in a 40), and two older ones in with Harlequins, Cherry Barbs, Yoyo, Kuhli, and Striped Loaches; and SAEs (in a 75).
That said, you don't have a heck of a lot of room in that tank. Remember that your Blues (the gold and the blue) are going to top out a bit over 5", the Banded around 4", the Paradise around 3 1/2", and the Dwarfs 2-3". Whatever you put in will need to be on the bottom. If your tank is well planted and has a sand bottom, I'd go for a half dozen Kuhlis. A small shoal of cories should work or 3 to 5 Striped Loaches so long as you have smooth gravel.