Ok well, you guys on okay prolly aint big fans of uk music, but i feel this guy "Akala" has alot of conviction, if you youtube him, im sure theres plenty of his tracks for you to checkout, tracks by him that you should look out for are, "carried away" , "Shakespeare" , "something inside my head", and a very convincing song by him is "bullshit" which reminds me alot of redmans "muhfucka",infact listen to as much of him as u can.

I'd also recommend Canibus, listen to him and youll know what conviction is, Tupac is an obvious definition of conviction in a rapper, theres so many artists, but its about which artist and genre most influences you.