Scary as in looks Maul looks like Satan lol but as fair as personality.
Lets see Darth Vader is a Monster kills Thousands of Jedis and killed plety of non Jedi.
Emperor is not scary at all
Darth Maul was Almost Scary with Silence and Killing attuide.
Jerec was just a dumbass Dark Jedi Wait hes No SITH! So he doesnt count.
But ya right on one thing Jedi_Prophecy Darth Vader rules I go Stand by the most Powerful "Sithlord" I go for Darth Vader.
Oh yes this poll as already be created.
"I am the most powerful Sith and I will destroy you!"