Many of the great painters have been migrants. Here are examples from Canaletto to Sargent. Suppress migration, and art will be stifled.
Kauffmann
Poussin was by no means the only artist to paint the narrative of Rinaldo and Armida. Here are many more.
Portraits by Reynolds, Gainsborough, Kauffmann, and others show extensive brushstrokes.
The Eclectic Light Company 