NEIL YOUNG
After Neil Young left the Californian folk-rock band Buffalo Springfield in 1968, he slowly established himself as one of the most influential and idiosyncratic singer/songwriters of his generation. Young's body of work ranks second only to Bob Dylan in terms of depth, and he was able to sustain his critical reputation, as well as record sales, for a longer period of time than Dylan, partially because of his willfully perverse work ethic. From the beginning of his solo career in the late '60s until the late '90s, he never stopped writing, recording, and performing; his official catalog only represented a portion of his work, since he kept countless tapes of unreleased songs in his vaults. Just as importantly, Young continually explored new musical territory, from rockabilly and the blues to electronic music. But these stylistic exercises only gained depth when compared to his two primary styles: gentle folk and country-rock, and crushingly loud electric guitar rock, which he frequently recorded with the Californian garage band Crazy Horse. Throughout his career, Young alternated between these two extremes, and both proved equally influential; there were just as many singer/songwriters as there were grunge and country-rock bands claiming to be influenced by Neil Young. Despite his enormous catalog and influence, Young continued to move forward, writing new songs and exploring new music. That restless spirit ensured that he was one of the few rock veterans as vital in his old age as he was in his youth.
ARETHA FRANKLIN
Aretha Franklin is one of the giants of soul music, and indeed of American pop as a whole. More than any other performer, she epitomized soul at its most gospel-charged. Her astonishing run of late-'60s hits with Atlantic Records -- "Respect," "I Never Loved a Man," "Chain of Fools," "Baby I Love You," "I Say a Little Prayer," "Think," "The House That Jack Built," and several others -- earned her the title "Lady Soul," which she has worn uncontested ever since. Yet as much of an international institution as she's become, much of her work -- outside of her recordings for Atlantic in the late '60s and early '70s -- is erratic and only fitfully inspired, making discretion a necessity when collecting her records.JONI MITCHELL
When the dust settles, Joni Mitchell may stand as the most important and influential female recording artist of the late 20th century. Uncompromising and iconoclastic, Mitchell confounded expectations at every turn; restlessly innovative, her music evolved from deeply personal folk stylings into pop, jazz, avant-garde, and even world music, presaging the multicultural experimentation of the 1980s and 1990s by over a decade. Fiercely independent, her work steadfastly resisted the whims of both mainstream audiences and the male-dominated recording industry. While Mitchell's records never sold in the same numbers enjoyed by contemporaries like Carole King, Janis Joplin, or Aretha Franklin, none experimented so recklessly with their artistic identities or so bravely explored territory outside of the accepted confines of pop music, resulting in a creative legacy which paved the way for performers ranging from Patti Smith and Chrissie Hynde to Madonna and Courtney Love.