Is there a way to sort guys by some sort of overall rating? There are lots of options for sorting but none of them really seem that useful in terms of a general overview of a player's effectiveness. Was just wondering if I am missing something.

I don't believe there is. You can ask your staff to suggest the five-best guys available, but no ranking option for OVR. I'll suggest this to Gary as a feature for the next version or perhaps a future patch, depending on how easy of an addition that is.