Here are a couple of my favorite Russian painters. I love it when light is portrayed well and not just dramatically. The atmosphere is particularly interesting and surrealy idealized in this piece by Serebriakova.
Harvest by Zinaida Serebriakova
Less well known than Isaac Levitan was Ivan Shishkin. I appreciate his rendering of the variety of forest light and trees in all the seasons. His paintings remind me of the Pacific Northwest here in the US.
Coniferous Forest by Ivan Shishkin