Doflamingo: i am just going to show you this picture JESUS CHRIST.

The one that would have the lightest sentence is probably Lotso. Since he did every crime on toys. So yeah

Grievous, Wat Tambor, Riff Tamson and Nuvo Vindi would all be trialed for multiple war crimes i.e. the Nuremberg Trials treatment. With Grievous getting the most charges of all four of them since he and Dooku are responsible for almost every war crime is C.I.S have committed.

Almost all of Melisha Tweedy's actions were directed towards chickens so I doubt she would get nearly as harsh of a sentence as 99% of other Pure Evil villains (since I doubt the law in their universe would be aware the chickens behave like humans).

Mrs. Tweedy or Lotso. I recommend looking at villains who haven't killed anyone.