From original rebels to genre-defying country heroes, these are the icons who paved the way for Americana.Americana, a music deeply rooted in the musical culture of the United States, has arguably been around in one form or another for more than a century: country heroes such as Jimmie Rodgers and his traveling tent shows of the late 20s were one of the earliest incarnations. And while “Americana” has been a category recognized at the Grammy awards since 2009, the term has been in widespread use for three decades. Whether incorporating bluegrass and country swing, or the storytelling folk of...