I've often wondered how the TNG crew would work in the TOS format, here are my thoughts:
Commanding Officer - Captain Jean-Luc Picard (Human)
Executive/Chief Helm Officer - Commander William Riker (Human)
Chief Medical Officer - Commander Beverly Crusher (Human)
Chief Science Officer - Lt. Commander Data (Android)
Chief Comm. Officer - Lt. Commander Deanna Troi (Betazoid/Human)
Chief Engineering Officer - Lt. Commander Geordi La Forge (Human)
Chief Security Officer - Lieutenant Natasha Yar (Human)
Chief Navigation Officer - Ensign Wesley Crusher (Human)