i have heard of Terrace Martin, but i've never actually heard any of his beats... unless... did he do a song on the new Strong Arm Steady album? other than that, he's always on albums that i say i'm going to listen to but never get around to it... like Murs or Kurupt. Dilla is my 2nd favorite producer ever, but RZA is my favorite.
and there are plenty of original rappers and producers out there imo. i wouldn't necessarily call Curren$y original, although i love his music to death. his production is always something new. Ski Beatz, The Alchemist... they're all good. and i also like what Statik Selektah, 9th Wonder, !llmind, Black Milk and Apollo Brown are doing. i think they're creative. a lot of the new producers coming out are dope. and i would say the same thing about a lot of the new rappers. Kendrick Lamar can spit, Big K.R.I.T., Action Bronson, Freddie Gibbs, Danny Brown, and people can say what they want about him, but i think J.Cole is ill. i'm a huge fan of the new artists coming out since 3-4 years ago. i'm not too upset about the state of rap as it is right now; it's been worse. i think Hip Hop is beginning to get better.
and i agree, i think sampled beats sound the best.