As one of the long reigning queens of Country Pop, Faith Hill sold millions of records and put thousands of butts in seats for her concerts. Hill may be massively successful, and will likely continue to be, but Pop flavored Country music has never made the Rock and Roll Hall of Fame, and as stunning as she is, there is no reason to think that she can break that ceiling.  

The run of Elastica was brief, but they had a very fruitful run on both sides of the Atlantic. BritPop opened the door for Elastica, although their catchy rhythms echoed the New Wave movement more than the other BritPop acts they were lumped in with.  Although they made it in both England in the United States, they were not able to replicate their success, though they never really seemed to try. 

DMX was a major player in the Hardcore Rap scene, and he enjoyed a high amount of commercial success. Actually, saying a high amount of commercial success was an understatement as he had the number one album on both the U.S. Mainstream and R&B charts (four of which actually debuted there). With an aggressive style and unparalleled intensity, DMX gruff vocals were matched by what was an organic portrait of the life he knew. As critically respected as he was commercially successful, the Hall of Fame chances of DMX lie in how many other Rappers before him get in and if his legacy increases.  This might sound harsh, but to paraphrase Chris Rock, if DMX had died young he would be considered legendary right now.

As laid back as they came, Digable Planets blended Jazz and Hip Hop seemingly without effort. In terms of the mainstream, they really only had one hit, but for many who listened to it, it was the first type Jazz/Rap fusion that they ever heard and it was a gateway to other forms of Alternative Hip Hop.