From its growling engine to its unmistakable body, the Mustang is arguably the most iconic car in U.S. history. Spearheaded by the late Lee Iacocca in the early 1960s and entered into America's imagination in 1964, seven generations of Mustangs have rolled off the line in as many decades. Over the years, the brand has had its icons and failures, but one thing has never changed: The Mustang is America's muscle car. (It's also the last remaining passenger car made by Ford for North America.) Here's a roundup of the best Mustangs of all time, including a new and perhaps controversial pick we're saving for last.