Assuming it's a ten person group with eight adults and two kids:
Rick, Carl, Glenn, Michonne, Daryl, Lee, Kenny, Carly, Molly and Clem
Leaders: Rick and Lee (obviously)
Supply runs: Glenn, Molly and Kenny
Combat experts: Michonne, Daryl and Carly
Kids: Carl and Clem
Despite the different backgrounds I could see Rick and Lee working together fairly well. The main team for supply runs would consist of Glenn, Molly and Kenny. Molly would be able to get just about anywhere, Glenn would do a good job of clearing a place out and Kenny could help as needed. I'll agree that Ken can be pretty hotheaded at times but I truly believe that he always has the best interests for the group in mind. For combat you've got Michonne with her katana and Daryl with his crossbow. In bad situations where the noise doesn't matter Carly would be able to snap off headshots and be second only to Rick in regards to that. Finally there's Carl and Clem. Despite being just children both can pull their own weight when called upon and would be far less of a burden than someone such as Duck.
Quotes of the Moment:
Why don't you tell him that there's been a verified sighting of me in Siberia? While I can't promise you he'll be the victim of polar bear rape, it should keep him out of the office for a while.
-Michael Thorton, Alpha Protocol
I reject your reality and substitute my own!
-Adam Savage, Mythbusters