As someone who likes every artist you named, my first suggestion would be Run The Jewels (aside: they put on better live shows than 99% of any artists out there; any genre), then it would be J.Cole (still very old school in his approach, but newish in terms of his material), and finally I would suggest Freddie Gibbs (very old school sounding in terms of flow, plus it just bumps). Honorable Mentions would be: Childish Gambino (real different/artisitc), Vince Staples (very raw sounding, but also very talented), and Young Thug (if you don't mind auto-tune and like people exploring their genre)