I have a 45 gallon tank and i want to know if my fishes will be good with each other?please help me out?

The gouramis wouldn't fit well in that tank; the other fish are too energetic and nippy. I would maybe add a few more platies and danios to the tank (definitely more danios, they need at least 6 in a group to keep their nippiness to themselves), and then you're done.