The fact that there has not been a single post from anyone who has claimed to benefit from the mentoring of any of the aforementioned possible mentors suggests that they may not be very effective and/or their students may be less active in posting than those who replied in this thread.
Just remembered a post from a former student of a well known training company. Can't remember how much he spent on training, but it was somewhere between 15 and 20 k. The training didn't help him to become a consistently profitable trader, but he still kept hoping his trading may improve one day. (delusion - an idiosyncratic belief or impression that is firmly maintained despite being contradicted by what is generally accepted as reality, typically a symptom of mental disorder)
Anyway I would suspect that the reason why you don't have any response is more likely because of failure of the trainers you mentioned rather than successful students being shy/modest/busy trading...