Theodore Roosevelt speaking from his porch at Sagamore Hill, 1916. The man could talk...and talk and talk. People who travelled and camped with him said he would never shut up, but he was a great storyteller.
In fact, in 1912 he was shot in the chest by an assassin in Milwaukee - but insisted on finishing his speech before going to the hospital. (His eyeglass case probably saved his life.)
The guy needed no teleprompter.