While there is historical dispute about the authenticity of the records of most (or all) of these men, they all have had a reputation as dangerous gunfighters. In fiction the term gunslinger has anachronistically been tied to them.

Clay Allison 
Curly Bill Brocious 
Billy the Kid 
Wyatt Earp 
John Wesley Hardin 
Wild Bill Hickok 
Doc Holliday 
Jesse James 
Bat Masterson 
Mysterious Dave Mather 
Johnny Ringo 
Dave Rudabaugh 
Sundance Kid 
Ben Thompson 
Bill Tilghman 

This list is not limited to the fictional characters of the American west. It includes many characters from science fiction westerns as well.

Roland Deschain 
Han Solo 
Hannie Caulder 
Rooster Cogburn 
Marshal Matt Dillon 
Jango Fett 
Jonah Hex 
The Lone Ranger 
Maverick 
The Man with No Name 
Lucas McCain 
Paladin 
Rawhide Kid 
Revolver Ocelot (computer game character) 
Josh Randall 
The Waco Kid 
Jim West 
Yosemite Sam (cartoon character) 
Lucky Luke (comic character) 
Robocop (film) 
Caleb (computer game character) 
Vincent Valentine (computer game character) 
Irvine Kinneas (computer game character) 
Grit (computer game character) 
Billy Lee Black (computer game character) 
Daisuke Jigen