I suggest you pick someone who is on consistently during the week. Some people have the ability to be on every night, some don't...but for the position of CO it would be best to pick someone who is on every night.
Then he'd have the necessary intel and experience to lead you effectively. So far I haven't seen any screen names other than Odee that are on consistently. But then again I don't pay a great deal of attention to the allied roster.
We axis really would like a difficult, coordinated, cohesive, allied opponent. Don't pick someone popular, pick someone who will be committed and someone who will be followed.