There is no ONE producer that is the BEST. Hip Hop has gotten too big for that.
You ask that question, and I can easily answer with "It depends on who you ask".
To really get at the scope of what's going on in hip hop and who's the best, you gon have to break that shit down by subgenres within the culture.
Me! I am! And thats just how all yall suppose to be thinking god darn it! LMAO! Who want to challenge me! I got the cleanest sound almost for a beginner! Check my post out @chuckychildsplay on ps3 call of duty right now! lol