John F. Kennedy
From Tardis Wiki, the free Doctor Who reference
John Fitzgerald Kennedy was President of the United States on Earth from 1961 to 1963.
The Master plotted to prevent Kennedy's assassination, but was thwarted by James Stevens. (MA: Who Killed Kennedy)
JFK was assassinated due to the Nemesis statue coming to Earth in 1963. (DW: Silver Nemesis)
Kennedy's likeness was included in a display at Madame Tussaud's of famous historical figures. (DW: Spearhead from Space)
Conspiracy theorist live showed pictures to Rose Tyler were one of them depicted the Ninth Doctor in the crowd at the assassination of Kennedy. Rose)
