This one is SUPER easy if you know to hunt for it.
Just Force push the hell outta guys. There are plenty of spots pretty early on that can get you this one. Just get around your target, and force push them in the direction you need to.
I unlocked this before I even got to the Ninth Sister and I hadn't even looked at the achievement list until the second or third planet. I'm rarely someone who recommends nabbing these kind of trophies naturally, but this one is just TOO easy. Good luck!