Mine is Agent Smith in The Matrix Trilogy.
So smooth, calm, calculating, philosophical, even respectful and gets the job done.
Hugo Weaving did a wonderful job.
Jacki Weaver as Smurf Cody in Animal Kingdom
shareHannibal Lecter (and it’s worth seeing Brian Cox’s ‘Lecktor’ in Manhunter if you haven’t)
Special mentions need to go to Annie Wilkes in Misery, and Hans Gruber in Die Hard.
Thank you for all the responses.
shareTerminator – Arnold Schwarzenegger in Terminator (1984)
T-1000 – Robert Patrick in T2 (1991)
Kahn – Ricardo Montalban in Star Trek II (1982)
Jack Napier/Joker – Jack Nicholson in Batman (1989)
Emile Fouchon – Lance Henriksen in Hard Target (1993)
Anton Chigurh – Javier Bardem in No Country for Old Men (2007)
Hans Landa – Christoph Waltz in Inglourious Basterds (2009)
Harry Lime – Orson Welles in The Third Man (1949)
Angel Eyes – Lee Van Cleef in The Good, the Bad, and the Ugly (1966)
Oooh, Kahn and Angel eyes, both very good calls.
shareAmon Goeth in "Schindler's list".
shareThanos because his insane plan actually kinda made sense.
shareDarth Vader and Palpatine
Col. William Tavington (The Patriot).
John Ryder (Rutger Hauer) - The Hitcher (1986)
https://www.youtube.com/watch?v=AQ_LIX7WQ_w