J Dilla is easily on of the most celebrated producers of all time. He has a very high stan-to-fan ratio as well, which means the people who listen to him, are generally pretty obsessed with him-- and for good reason.
Doe B was fatally shot last year, tragically ending what could have been a long and successful career. Outside of being a great rap talent, Doe was also known for his work ethic, and thus left behind a plethora of unheard material.
Doe B tragically passed away last month, but rumor has it the rapper had recorded a lot of material that never saw release. Turns out, a posthumous album will be released in the near future, and the T.I.-assisted "Why" serves as the first single.