One of the most successful acts to come out of the 21st century's English folk-rock revival, Mumford & Sons' agreeable fusion of bluegrass, folk, country, and rock has found favor with audiences both at home and abroad ever since they released their debut album, Sigh No More, in 2009. Their chart-topping sophomore effort, 2012's Babel, won Album of the Year at both the Brit and Grammy Awards, which led to the band headlining the 2013 Glastonbury Festival. Mumford & Sons' sound evolved with the 2015 arrival of Wilder Mind, which adopted a more stadium-ready alt-rock style, a pr...