this guy is just off the charts
http://www.youtube.com/watch?v=6hb7DYgcwSo

The reason why arranger players struggle to get to this level of creativity is because they are always looking for the next technological break through in keyboards rather than just loving making music and developing their skills to make even greater music. this guy loves making music and it is clear that he gets a greater kick out of the music than even his audiebce.