Country music has been growing as an art from since Eck Robertson’s recording of “Arkansas Traveler” in 1922. From the days of 78 RPM vinyl to digital downloads, fans continue to flock to the format. So who are the 22 greatest country artists of all time? That list might very well be subject to conjecture as the definition of country, but here are the acts that have made an immeasurable mark on the genre. In compiling this list, we took into consideration sales, airplay, and influence upon the genre — and outside of it. Let the debates commence!