Personally, I think that the following producers are truly slept on...
1.Khrsyis
2.Nicolay
3.Kev Brown
4. Buckwild
5. Beats By The Pound
6. EZ Elpee
7.Saleem Remi
8.Young Guru (people tend to forget that he was there when Just Blaze and kanye were at the Roc too)
9. Mannie fresh ( they never give him his just due when they speak of the elite circles i.e Dre, Timbo, Premo, Pete Rock, etc but they forget that he singlehandedly created CMR's whole sound, and their entire catalogue)
10.Me, nah just kidding but I think that people sleep on Rich Harrison alot too, especially when they speak of hot R&b producers. I mean, you always hear about B.Cox, Darkchild, Bryce wilson, and the like but they tend tend to sleep on him a bit too much.