Which Villains You Thought Had The Greatest Potential In The Entirety Of Ninjago?

Ninjago had a lot of 10/10 villain ideas, but most of the time the implementation was not as good as the ideas, so which villain have you really felt that they could've been better? I'll begin: Krux ans Acronix probably had the greatest potential with their elemental powes and they're my favorite characters in the show as well because controlling the element of time basically makes them unstoppable aside from taking their powers and it would be really exciting to see how the ninja will stop...