The Negroni has a true-blue American version.  It’s called the Boulevardier and uses Wild Turkey Bourbon in place of gin.  Read more about the history of the Negroni

Also try: El Negroni de la HaciendaThe Oaxacan Negroni, The Parisian NegroniThe Negroski, The White Negroni, and the Negroni Di Fiori.