From Redford to Eastwood

What is this a list of (exhaustive):

Robert Redford – Ordinary People
Barry Levinson – Rain Man
Kevin Costner – Dances with Wolves
Roman Polanski – The Pianist
Clint Eastwood – Million Dollar Baby

Answer: (select the text below to show)

The winners of the Oscar for best direction in the years Martin Scorcese was nominated before he finally won this time.

Question by Amit Varma