Karl Austen
Why he matters: Austen doesn't just provide legal counseling to clients. He recently helped renovate Jonah Hill's career, structuring a deal for him to co-star in and co-write 22 Jump Street. He also closed Seth MacFarlane's deal for Ted 2, a sequel to his $550 million-grossing talking teddy bear movie, and helped the Family Guy creator transition into live acting with A Million Ways to Die in the West, which MacFarlane also co-wrote, produced and directed.
Biggest Hollywood tantrum he's witnessed: "A famous studio chief didn't get a spec script I was selling on behalf of a client. He called me up to tell me he was calling my boss to get me fired. That was funny."