Why hasn't Denzel Washington worked with a Spielberg or Tarantino or Scorcese or even Soderbergh?

Surely his paths must have crossed with those top directors and more over the last few decades. Denzel's worked multiple times with the likes of Spike Lee, Ed Zwick, Tony Scott and Antoine Fuqua but I gotta ponder has he ever been up for a lead in a Spielberg or Tarantino film? Did he ever wanna work with any of the top directing talent in the industry? Most of his films, he's by far more known and powerful than his director.

Any films you'd have loved Denzel to have worked with them on?