Third Person Dinobot

The Story about the Transformers Grimlock and what makes him the greatest Autobot leader...or not? We all know the mighty Grimlock as the oftentimes arrogant leader of the Dinobots. But there have been times when he's been the leader of all the Autobots as well as the leader of nothing. So what events caused his rise to power and eventual fall from grace, and where does he ultimately end up? How did this Dinobot turn into a Scavenger?