Hi, Like your plants and tank in general!!
Regarding the Gouramies; The more dominant one will continue to chase the other from now on, in many cases. You could either take one back to shop/re-home in a spare tank, Or get a few more> although this won't guarentee the chasing to stop, only disperses it to others..... + would u want more, as it reduces numbers of other fish you could add.?
My Male Gourami chased Female at alarming rate, until I removed her. > Then any other Gourami/similar sized fish was chased constantly. >Ended up with it as main fish in Community tank for 12 yrs.!
Good luck.