Who is the most INSANELY evil (not most powerful) Sith?

Who is the most deranged and badass evildoer? I think Vader might seriously be it. I mean, powers aside, I think that he could intimidate pretty much anybody. But there might be others more angry than he. Darth Bane...
Exar Kun...
These were pretty hardcore guys.
Then there's that one who supposedly got turned into a cyborg, Lord Nyax I think (this isn't from SS but it might not be from George Lucas either...)

I can't remember what his name was, but that guy in the Sith tomb in KOTOR, the one that made you decide proper sith answers or some chump would get tortured.

Oh yeah. Does anybody have any more information or answers? Ideas? By the way, it's nice to make your acquaintance, Mr. Gryn Jabar sir. Thanks for the post.

Your very welcome. I know that Vader and Revan can't be the most evil, as they eventually repent, or are completely seduced.

but Vader does kill children

Duuuuuude! By the way, Nefarus - I just wrote a story and I'd like to hear what you think. It's on the second page of the Star Wars Battle Storytime thread. If it's not too much bother...

The most insane Sith of all time is Lord Kaan. The guy used the thought bomb to kill all life on Ruusan during the battle between the Brotherhood of Darkness and the Jedi Order. Well, technically he isn't Sith, I don't think. But he was off his rocker for sure.

I don't mean crazy - I mean absolutely intimidating. Like, for example, picture all of the Sith in a room, mingling. Who would be the guy that makes everybody else go "Woah" and back the hell off?

Marka Ragnos. He makes Sadow cower and Sadow was crazy enough to challenge the Republic. Exar Kun himself was dubbed Sith Lord by the ghost of Marka Ragnos. You show respect to that man, for sure.

True dat. Anybody else?

lol, Marka's spirit didn't exactly intimidate Jaden especially when he took over Tavion's body and got manhandled by Jaden.

Janus is really right though. Most Sith are too arrogant to be intimidated. Vader intimidated everyone because there were no Force users. Maul didn't get much of a chance. Dooku's just not intimidating. Revan's not exactly intimidating but EVERYONE he faced soon learned the errors of their ways and would cower in fear if he coughed after that. Malak was a little intimidating, but like Vader not against other Force users. Sidious is more like Revan except weaker that no one feared him much until they realized his power. the others aren't of enough importance or I just dont know enough abou them so Marka Ragnos.

Now this is basically a contest of who is ugliest and who looks most powerful...

I have no idea, but Ragnos has a cool name so i'm going with that.

Why isn't Sidious an option here? Why isn't Kaan? Who the hell is Nyax?

Answer me these questions three and I'll let you pass over the bridge to the other side.

Oh yeah Sidious looks damn scary...

Why would Sidious be an option?

Sidious is not an option because he's like a mafia boss, who admittedly has combat skills, that sends off Vader to rough people up. He trusts Vader not to mess up in b!tching up Skywalker - Sidious may be evil, but Vader has an anger way more intense. Sidious kills to get power - Vader kills for a hobby. He picks up helpless rebel shipmate in ANH and chokes him to death (NO force choke, remember - his bare goddamn hands) even when he hadn't answered the interrogation. He kills admirals whenever he's pissed. He tortures Han Solo just because he felt like it in ESB ("They never even asked me any questions" said Han afterward - well, you know that). Sidious would never kill if it didn't get him anything. He simply wasn't as violent as Vader.
Kaan isn't an option because this thread is about pure anger, and Kaan was more crazy/stupid than hateful. He got everyone killed, and he was not even a Sith. Sorry, I just think that if it weren't for him, the Sith Order could have gone on to have an interesting war with the Jedi. But if it weren't for him I suppose Sidious would never have taken over the Republic (two Jedi only)...
Anyway, lastly, Nyax is a guy who had great potential, then fought and, I think, actually died in a duel. His father did a job on him, though, brought him back as part machine in Luke's day, and he is NUTS. He doesn't even know the difference between right and wrong.
Those are your answers, Wanderer. I wanted to give intelligent responses.

I agree, while Sidious is evil and whatnot, he still needs an enforcer because he's too busy ruling the universe.

I still say Vader because he's a child killer, subordinate killer, son beater, wife killer(she was pregnant no less), and he completely betrays his order in a genocidal fashion.

Yeah. That is my point. Good, one man.

yes,,now i officially hate vader cuz of what he did to younglings!!!!
he is a B1tch,,i wish i was there to stick his ****in saber right up his a$$!

HaHAA!
That's the spirit! Release your anger! Give in to your hatred! Soon Vader's ranks will you join!

on the path of the light remain i will