Relevant Rap ?

 As long as Rap was considered to be an outside source, rap had the power to motivate change.
But those who run the music industry know this, which is why once a performer sells his soul for points he becomes part of the establishment.
He cedes his power to those who would rule him one way or another.
As long as Punk and Rap were seen by the industry as worthless pretenders - there was no need for music execs to worry about these upstarts.

But then Punk groups like The Clash started to attack the establishment (Which sought to quell such an uprising by bringing them into their fold by making them bona fide Rock Stars).
But The Clash were still outsiders who recorded songs critical of Margret Thatcher, American policies and the treatment of Blacks in Brixton (Or Watts).
These groups recorded songs that criticized the treatment of Nelson Mandela and others in the Apartheid system in South Africa (Simple Minds' Mandela Day, The Specials' Free Nelson Mandela or a bunch of songs by U2.)

 But Pop groups never had such a luxury.
When the Human League recorded a song critical of the Israeli occupation of the West Bank - their musical career was cut short.

 Even media darling Boy George and the Culture Club suffered from recording The War Song.

 But outsider artists could still get away with protesting against South Africa - the establishment did not own them.

Even M.I.A. had a hit which could have been set in Brixton, or Watts or Newark (To bring the thinking of The Clash full circle.)
Which is why the only relevant Rap is outsider Rap.
Check out Kay Dub
http://konwomyn.blogspot.com/
No commercial Weezy there - just the occasional mention of relevant Hip Hop from the perspective of an empowered outsider.