need vocal for 1 song

we want to know if you can help us, we are searching for one dark vocal rap for our song. something like black skinhead of Kanye west. can u help us??

Additional info:
I need the vocals tuned as well. I don't have a hard deadline for this. I need all the vocals recorded (lead vocals, harmonies, stacks, ad libs). I'm looking to hire a top pro who's worked on hit songs, and have the budget for that. I don't need the song mastered. I'm an artist signed to a medium or large label.