#1: Dennis Hopper as Frank Booth in Blue Velvet
"Hieneiken? Fuck that shit! Pabst Blue Ribbon!"
#2 Clancy Brown as the Kurgan in Highlander
"Ramirez was an Effete snob. He died on his knees. I took his head and raped his woman before his blood was cold!"
#3 James Earl Jones/Richard Prowse as Darth Vader, Star Wars IV and V (the other movies sucked!)
"I find your lack of faith disturbing"
#4 James Earl Jones as Thulsa Doom in Conan the Barbarian
"contemplate this on the tree of woe! Crucify him!"
#5 Kjell Nilsson as the Humongus in Road Warrior
Toady: "Greetings from The Humungus! The Lord Humungus! The Warrior of the Wasteland! The Ayatollah of Rock and Rolla!"
#6 Louise Fletcher as Nurse Ratched in one flew over the cukoo's nest
"You know, Billy, what worries me is how your mother's going to take this."
#7 Arnold Schwarzenegger as the Terminator in Terminator
"your clothes... give them to me, now."
#8 Jack Nicholson as the Joker in Batman
"And now, folks, it's time for "Who do you trust!" Hubba, hubba, hubba! Money, money, money! Who do you trust? Me? I'm giving away free money. And where is the Batman? HE'S AT HOME WASHING HIS TIGHTS! "
#9 Christopher Walken as the Headless Horseman in Sleepy Hollow
"shhhhh!"
#10 Maurice Evans as Dr. Zaius in Planet of the Apes
"You are right, I have always known about man. From the evidence, I believe his wisdom must walk hand and hand with his idiocy. His emotions must rule his brain. He must be a warlike creature who gives battle to everything around him, even himself. "

have we all forgotten the guy who shot Bambi's mummy or the government guy who pronounces ET dead. BASTARDS!

The Cannibal Punk king in Doomsday, he's fucking nuts, like the guy from Road Warrior but Scottish thus scarier.

Mr. Knuckles McGrumpy said:

Ben Kingsley in Sexy Beast could take anybody on that list.
Michael Madsen as Mr. Blue in reservoir dogs, or was he Mr White?
The twins in Breaking Bad that worshipped Santa Muerte and killed people with a chrome ax. A CHROME FUCKING AXE for God's sake. Deadly and cool.

Ben Kingsley is cool as shit. The only villain I have seen him play, however, was as Dr. Roberto Miranda in "Death and the Maiden--" and you didn't even know he was a villain until the film was almost over.

Ben Kingsley in Sexy Beast could take anybody on that list.
Michael Madsen as Mr. Blue in reservoir dogs, or was he Mr White?
The twins in Breaking Bad that worshipped Santa Muerte and killed people with a chrome ax. A CHROME FUCKING AXE for God's sake. Deadly and cool.

Heath Ledger's Joker in "The Dark Knight."

"I'm gonna make this pencil disappear...TA DA!!! It'ssss...gone."

@Gary Oldman

"Gary Oldman's character Stansfield in Leon"

right on

I just watched Precious a few days ago, and I must say that fat bitch mom is pretty darn evil!

Javier Bardem as Anton Chigurh in No Country for Old Men.

That scene in the convenience store? it gets no more menacing than that.

If I had a #11 on the list it would be Lo Pan!

MAAAYBE kind of off, since he doesn't clearly take the part of the bad guy, but Nicolas Cage in the Werner Herzog version of Bad Lieutenant, was freakin kick ass! Most possibly everything he ever let out of his wrenched mouth made it a classic part in my eyes. He sacked every bad dude in that movie.

the 'citizens against crime' in suburbia. mainly the 2 douche bags who kept showin up at the TR house and kill ethan. i couldn't figure out what there names were. oh and the asshole store manager who razzle gets back with the slushie n eggs.
"happy easter asshole!!"

For me it has to be between:
Willem Dafoe as Bobby Peru in David Lynch's Wild At Heart
or
Larry Drake as Dr. Giggles, and Durant in Darkman

Strother Martin as the Captain in Cool Hand Luke
"What we have here is failure to communicate"

Catherine Begin as Mademoiselle in Martyrs
Nothing quotable but she excudes menace as she calmly tells her victim basically she's screwed.

Gary Oldman as Stansfield in Leon
"You're a Mozart fan. I love him too. I looooove Mozart! He was Austrian you know? But for this kind of work, he's a little bit light. So I tend to go for the heavier guys. Check out Brahms. He's good too"

Robert De Niro as Jimmy the Gent in Goodfella's. Far more menacing than Joe Pesci. Refer the bar scene where they try to kick the guy to death.
" Look what this f******* mutt did to my shoes"

finally for now

Stanley Tucci as George Harvy in The Lovely Bones. My missus dragged me to see it, but his performance was top shelf.
No real quotes, but check it out if you get a chance.

Ben Kingsley as Don Logan in 'Sexy Beast'.
"I gotta change my shirt, it's sticking to me. I'm sweating like a c*nt".

My list would be real similar... I'd pull Nicholson's Joker, Nurse Ratchet, The Headless Horseman and Dennis Hopper, but add

(J.E. Freeman??? Is that his name?) Eddie Dane from Miller's Crossing
"Why Would Einstein want to talk to a gorilla? So I grabbed the gorilla... And I made him Talk..."

Jack Palance as Jack Wilson from Shane
(Can't recall a quote... But his best scene involved him slowly putting his gloves on and coldly gunning down a rancher. )

Lee Van Cleef as Angel Eyes The Good The Bad And The Ugly
"When I'm paid, I always follow my job through. You know that."

Tererance Stamp as General Zod in Superman I & II
"This "Super" man is nothing of the sort. I have deduced his weakness. He ACTUALLY cares for these humans." or of course "Kneel before Zod"

My additions:
#11 Cruella De'ville from 101 Dalmations
"Poison them! Drown them! Bash them on the head!" - and these are puppies we are talking about...101 cute little puppies

#12 Calvera - The Magnificent Seven
"If God didn't want them sheared...He would not have made them sheep."

#13 Police Captain Hank Quinlan - A Touch of Evil
"That wasnt no miss, Vargas. That was just to turn you
round, so I dont have to shoot you in the back. Unless youd
rather run for it."