Any platies are great, they come in heaps of colours! so for example I have 4 platies and they are all different colours, they like people, mine even let me pat them and line up for it! and they look nice too. Mine are with neon tetras which are really small but really nice fish, so I may suggest a couple platies and half a dozen neon tetras. I would however put 3 neons in first off and test them with your platies in case they get eaten, also be sure you get your platies as juveniles so they are not big enough to eat theneons when you first introduce them. Im only a beginner myself, so may not be totally accurate but it has worked for me!
hope this helps
hope this helps