How to stop male gourami being aggressive to tank mates?

I have three gouramis, two female dwarf neon blues and one male blue paradise gourami. I just bought the male yesterday and I realized that he is chasing the corys and barbs. I have a giant cave-like structure in the middle of the tank and a bunch of plants. Lots are still growing in but there is lots of floor coverage with java ferns galore growing in. There are lots of crevices to hide in. I don't know why he's being so aggressive. Also, can two gourami species breed and make fish mutts?