Those fish should do fine together. It would be best to choose between the platies and swordtails rather than mix them. It is possible for them to cross breed with each other so a choice should be made. The platies are more peaceful so you could keep maybe 2 males and 5 or 6 female platies. If you go with swordtails, you should probably get a single male and maybe 3 females. The mollies are some of my favorite fish and I would have way too many, but a sensible stocking level might be 2 males and 4 female mollies. In my opinion, a gourami is best done with a nice sized one and a single gourami makes a nice centerpiece fish. With these combinations you would have an easily maintained light stocking level. The thing that is missing with the loaches gone is a bottom active fish. Some possibilities are a small group of 4 or 5 cories or a nice pair of kribensis. The cories will do duty as a cleanup crew for food the other fish miss. The kribs are a beautiful fish that tends to stay close to the bottom but is not cleanup crew.