Who are artists that paint peaceful landscape of mountains forests and rivers?

In Italy French painters Claude Lorrain and Nicolas Poussin, 17th century. In the US 'Hudson River School', 19th century: Asher B Durand, Thomas Cole, JF Kensett, George Inness, Frederick Edwin Church, and others. Here are some painters and paintings that come to mind:

Nicolas Poussin, Landscape with St. John on Patmos

Puvis de Chavannes, The Sacred Grove, Beloved on the Arts and the Muses

John Constable, The Hay Wain

Theodore Rousseahu, The Forest of Fontainebleau, Morning, and

Albert Bierstadt, The Rocky Mountains, Lander's Peak