The problem isn't lack of talent, it's an over exposed industry now where mainstream hip-pop is as you describe so you have to look down the little side paths youtube takes you.
Mainstream wise J Cole got talent but he getting old hat already, any other decent new mainstream artist... you're going to have to let me know who you find.
So much decent music coming from UK and even Africa now the US scene had no chance, especially as it was in its cash money little Wayne faux-talent ******** phase with the biggest rap artist to have ever lived making pop music with ghost writers... it's redefining itself at the moment, just a shame US radio aren't taking any notice.