Yeah. They'd fit, if kept individually. However, IMO, that's too many gouramis and the tank is too small for pairs if your males are interested in breeding.
I'd say a 55+ if you don't want aggression! Paradise males will rip eachother apart gold gouramis are just as aggressive as blues (they are the same species), moonlights get a little big (6") but he dwarfs would be ok. I would say oneof each and maybe 2 dwarfs to be safe