I'll put a cross-reference in this thread to the
Youngblood Brass Band, which has two vocalists, three trumpets, two trombones, a sax, a sousaphone, and two percussionists. Great brass band sound like the Dirty Dozen Brass Band, plus hiphop vocals on half the tracks. There's seven free downloads available on their site.
I am not a hiphop fan, but I'm enjoying this one.