Hugh O’Brian, who shot to fame as Sheriff Wyatt Earp in what was hailed as television’s first adult Western, has died. He was 91. A representative from HOBY, a philanthropic organization O’Brian founded, says he died at home Monday morning in Beverly Hills. Until “The Life and Legend of Wyatt Earp” debuted in September 1955, most TV Westerns — “The Lone Ranger,” “Hopalong Cassidy,” the singing cowboys’ series — were aimed at adolescent boys. “Wyatt Earp,” on the other hand, was based on a real-life Western hero, and some of its stories were authentic. (The real Earp, who lived from...