This would include vocal, song writing, a instrumental abilities.
I think I'd go for Dustin Kensrue, the singer from Thrice. He writes fantastic lyrics, plays pretty good guitar, has a pretty versatile voice and is one of the driving forces behind a very talented, and musically diverse band. I could definitely do everything I could ever want to do musically with his abilities.
Close second would be Casey Crescendo from The Dear Hunter.