The second in a series of its "Greatest" specials, CMT 40 Greatest Men of Country Music is a three-hour documentary honoring the 40 men who have made unforgettable contributions to an entire music genre. Among those honored: Vince Gill, Tim McGraw, Dwight Yoakam and the late Johnny Cash and Waylon Jennings. Elvis Presley is listed at #15.

The Top 5
1. Johnny Cash
2. Hank Williams
3. George Jones
4. Willie Nelson
5. Waylon Jennings