1 Janis Joplin(Known for Her Powerful Mezzo-Soprano Vocals)
Best known for her powerful mezzo-soprano voice, Janis Joplin was one of the most successful rock stars of her era. Before dying at the age of 27, she achieved so much that Rolling Stone magazine included her in its 100 Greatest Artists of All Time list in 2004 and 100 Greatest Singers of All Time list in 2008.