Bruno Tostes is a Renzo Gracie Blackbelt who is in NYC weekly training with UFC champs like GSP and Frankie Edgar. While you may not want aspire to reach that level, I can tell you from experience there is comfort in knowing you're learning the best technique.
Mike Faragon is our boxing coach. He is currently 16-0 as a pro boxer with his last fight being featured on espn2. His classes are non-contact (but sparring can be arranged if desired) and are popular with both men and women.