Sorry but here is where your WRONG with your argument...
All three of those artists were blacks who WONT CHALLENGE OR COME OFF AS THREATNING TO THE STATUS QUO
they maeginalized R&B since the justin/thicke takeover and gave the darkies TRADITIONAL R&B ..the category which GARY CLARK Won
whom happens to WORK for WARNER MUSIC GROUP
just like good ole LALA HATHAWAY employed by UNIVERSAL/STAX who FINALLY got a Grammy because she cosigned that racially friendly group of diversity known as SNARKY PUPPY
http://t2.gstatic.com/images?q=tbn:ANd9GcRFtkH_xKDjY6qNCDklMqEq5vqC-oNMgVM7i0RomrxOzFJHoWXDSBONBC6m
Snarky Puppy.....^^^^^ looks kinda gay friendly too lol
Oh and DARIUS how can we forget UNIVERSALS 360 DEAL success story
either way u look at it BLACK ARTISTS had to lose something in terms of dignity and soverignty to win
just like HIP HOP had to become eurocentric and gay friendly to be recognized
sorry grasshopper BLACKS DID.LOSE and so did HUMANITY
nah...snarky puppy been making waves in the jazz world. No diss to them at all. they've been putting it down.