Bone Thugs-n-Harmony
The group is considered as one of the greatest hip hop groups of all time. Bone Thugs-n-Harmony is the only group that has worked with Tupac Shakur, the Notorious B.I.G., Eazy-E, and Big Pun while they were all still alive. About.com ranked them number 12 on its list of the 25 Best Rap Groups of All Time. MTV called them "the most melodic hip-hop group of all time."