6. Widespread Panic
There might be two kinds of people in this world: Those who are absolutely obsessed with Widespread Panic and count down the days until their next Red Rocks shows – and those who are barely aware such a band even exists. The group, which has been touring regularly for the past three decades, has never had anything resembling a hit, but their legendary live sets have made them one of the most successful touring bands of the past 20 years. Tragedy struck in 2002 when guitarist Michael Houser died of cancer, but Jimmy Herring joined in 2006 and has done an excellent job carrying on the legacy.