Could maybe start the cycling process with 5-6 Guppies
Gourami's are great, they are usually non aggressive, You could keep several different varieties, Pearls, Golden, 3 Spot, Blue, just keep away from the Dwarf variety, they never seem to last long.
I've got Golden Barbs, Cherry Barbs, Neons, Corys, Swordtails, Black Widows, Keyhole Chiclids, Rosy Barbs etc with mine and they all seem to get on well.
Should be fine having a Simease Fighting Fish, just remember one Male only per Tank.
Good Luck with your new Tank.