Ahh my neck of the woods. Thats like asking Laurel and Hardy, or Abbot and Costello, or asking the Three Stooges or The Marx Brothers....Tough call, I would rather not do without any of them!
I am a Keaton fan through and through. It isn't that i do not enjoy "The Tramp" or the others that Chaplin portrayed...I just enjoy his physical comedy, and the look "stone face"(very deadpan) he would give.
One of my all time favorite Twilight Zone episodes was the 1961 episode "Once Upon a Time" where Keaton-a janitor in 1890 puts on a helmet that transports him to 1960. The 1890 segments are "silent film" style, where as the present-1960 included sound.
LOOK IT UP IT IS GREAT!!!!
http://en.wikipedia.org/wiki/Once_Upon_a_Time_(The_Twilight_Zone)Don't forget about Harold lloyd...lesser known, but he was a daredevil, did all his own stunts, and all with 1 hand (the other was badly damaged on set when a prop bomb exploded- he wore a glove to disguise it from then on)