This guy has the best evil laugh. In fact, he perfected the art of it https://www.youtube.com/watch?v=x39_Xu1Yx1k

Hmmm... maybe either Emperor Palpatine or Light Yagami. But on the list, Joker... depending on the Version.

Janja does :D

Joker easily. But Jafar has the best Disney Villain laugh.

Lelouch vi Britannia or Light Yagami

Mandark