The Most Important French Painter in the Late 17th Century?

Answer 1

It was Charles Le Brun (1619-1690), declared "the greatest French artist of all time" by no less an authority than the sun king himself--Louis XIV. He created the Louis XIV style and his influence can be seen at Versailles, the Louvre, and other royal palaces.

Answer 2

Louise Moillon (1610-1696) Moillon is the greatest French still-life painter of the seventeenth century.