Massive Attack made an immediate impact with their 1991 debut, Blue Lines—right from opener “Safe from Harm” and its low-slung input from early member Tricky. The album absorbed Bristol, England’s Caribbean diaspora and industrial backdrop to develop a sleepy, soulful new sound dubbed “trip-hop”. Star vocal turns often show up in the group’s bass-warmed soundscapes, including Everything But the Girl’s Tracey Thorn on the title track of 1994’s slinky and introspective Protection and Cocteau Twins singer Elizabeth Fraser on “Teardrop” from 1998’s dark and claustrophobic Mezzanine. With Robert “3D” Del Naja now the one constant in a shifting lineup, 2003’s sample-free 100th Window saw Blur’s Damon Albarn and Sinéad O’Connor step up the mic, while 2010’s Heligoland followed suit with members of Mazzy Star and TV on the Radio. Through it all, the group’s rustling moodiness has continued a fruitful conversation with such heirs as Thievery Corporation, Burial and Sampha.