that's a really good question, Bas Rutten or Eddie Bravo, Sperry or Nogueira...there's tons, but honestly, I'm involved more in sub tournys than MMA even though a train to compete in both, so i guess someone who leans more towards submission wrestling rather than MMA, the btt guys , if we're talking just instructors, im gonna have to go with bas rutten, if you see his big dvds then you can see just how much he knows, even in the way of submissions he knows so much that the information would be amazing, i would like to take some prvates from rampage though