Who is the greatest American villain?

[Kylo Ren]

Originally Posted by Rain Man

The nominations I'm accepting so far are:

O.J. Simpson
Bernie Madoff
Timothy McVeigh
Ted Bundy
John Wilkes Booth
The BTK Killer
Benedict Arnold
Jeffrey Dahmer
Andrea Yates
Joseph McCarthy
The Unabomber
Karla Faye Tucker
Lizzie Borden
Charles Manson
David Berkowitz (Son of Sam)
John Wayne Gacy
The Zodiac Killer
The Green River Killer
Jim Jones
James Earl Ray
Ed Gein
Robert Courtney
Boss Tweed
Al Capone
Billy The Kid
Jesse James
Jim and Tammy Faye Bakker
Leona Helmsley
John Dillinger
Fred Phelps
Robert E. Lee
Mark Chapman
Al Capone
David Koresh
Bryant and May
Blanck and Harris

I'll also add:

Lee Harvey Oswald
Julius and Ethel Rosenburg
Nathan Bedford Forrest
Robert Hanssen
Aldrich Ames
John Walker
Kenneth Lay
Bernie Ebbers
Joseph Hazelwood

Anyone got others to add? Or did I miss any realistic options offered earlier?

Barack freaking Obama! Put him on the list!