This is The Uchiha Hierarchy of the known 5 Main Uchiha's that were shown in action.
1. Obito Uchiha.[Not Prime Obito]
2. Madara Uchiha [EMS].
3. Sasuke Uchiha [EMS].
4. Itachi Uchiha [Alive + Healthy].
5. Fodderzuna Uchiha [Prime].
Lets start from the bottom.
Fodderzuna loses to every Uchiha that is above him
All hail the true Boss of all Uchiha's :