Most skillful Hero/Champion/God in any moba?

What are your opinions of the most skillful champions/heroes in mobas? I'm talking about what is the most difficult to master/ or play. This is based on Mobas such as League of Legends, Dota 2, Heroes of Newerth, Heroes of the Storm, and Smite.

This is my list

10: Lee Sin (LoL) 9: Earth Spirit (Dota 2) 8: Li-Ming (HotS) 7: Monkey King (HoN) 6: Azir (LoL) 5: Invoker (Dota 2) 4: Chen (Dota 2) 3: The Lost Vikings (HotS) 2: Meepo (Dota 2) 1: Medivh (HotS)

What is your list?