Hey guys!

This is my first post here, though I've been lurking for a month or so. Anyways, I've just recently gotten interested in fish. I did my research and then set up a 12 gallon FW tank. It's fairly new and is cycling still with 3 platies (don't worry, I'm doing daily water changes). I didn't pay much attention when buying the platies and ended up with 2 boys and 1 girl. One of the males is pretty aggressive and is constantly chasing the other two around. I suppose as long as he's not injuring them, this should be ok, right?
Still, he worries me. Once the tank has finished cycling, I would like to add a dwarf gourami, but I'm afraid this pushy platy will bother him too much.
What are your suggestions? Should I skip on the DG? Would adding more female platies calm the males down?