Bee Low from Beatbox Battle TV passed along the above video, featuring French beatboxing champ Eklips going (vocal) scratch for scratch against Q-Bert and DJ Nelson at the Festival Interferences in Strasbourg, France this past November. I don't think Eklips is quite up to Rahzel's skill level, but I'm told by people who know more than I do about the art form that he's generally considered to be the best in the game right now.
From the same event, here's Eklips doing his version of Busta Rhymes' Break Ya Neck: