Ask HN/Poll: Who is/are your greatest mentor(s), and why?

I would like to conduct a poll, however this poll requires your reply. I would like to know who your greatest mentor(s) is/are and why you think so?

As for me, I would have to say its a close tie between my Dad and Barry Fey.

- My Dad has taught me many lessons in business from the time I was 7 years old and opened my first lemonade stand to about 5 minutes ago.

- Barry Fey (http://www.barryfey.com/) is one of the greatest concert promoters of this time. He is nicknamed the "Rockfather" by the Rolling Stone, he was the first promoter to bring many bands to the US (Led Zeppelin is one), holds gold records from many bands (The Who is one), and I am proud to have called Barry Fey - Roommate. The school of Barry ROCKS!

So those are my top two, who are yours?