Captain Conundrum has kindly written up an article detailing his League of Commanders mod. Designed for competitive team games, it changes each commander to have its own unique set of abilities. There’s even a pick rotation mode similar to that seen in MOBAs like League of Legends or DOTA2 whereby teams take it in turns to pick a commander which is then unavailable to everyone else.
Check out all the details here. Learn about each commander and what they bring to the battlefield. Personally, I recommend the Quitch.