Mainstream Poker Hero or Idol is Phil Ivey. However, my most influential poker hero/mentor/trainer is Deep Stack Gary Jacobson and Doug Polk in a combo package. These two Wizards have more than doubled my winrate the last 1000 hours
Doug Polk is a great ambassador or the game and if poker players in general. He cares to both the free audience, via YouTube, and the paid audience via Upswing.