To expand on the "tiers" idea for directors who made a real debut in the 1990s I'm semi-comfortable with this as a rough and obviously non-comprehensive rough draft:
Tier 1: Tarantino (1a) and PTA (1b)
Tier 2: David Fincher, Brad Bird, Wes Anderson, Sam Mendes, and John Lassiter.
Tier 3: Ang Lee (this is a slap in the face, he's only in tier 3 because I have a strong preference for his early Mandarin-language work and think he's gotten worse with time, based on his early work alone he would be in Tier 2), Cuaron, Guillermo Del Toro, Christopher Nolan, Frank Darabont (penalized for only adapting Stephen King works in practice), Noah Baumbach, Alexander Payne, and Darren Aranofsky.
Everyone else (Baz Luhrmann, Robert Rodriguez, M. Night Shymalan, Kevin Smith, Mel Gibson, Mike Judge, Paul Haggis etc etc)