Growth of the Soil and Victoria didn't really do it for me, but I quite liked Mysteries, and Hunger and Pan are both masterworks. If you like him, I strongly suggest Par Lagerkvist for more Scando-misery.

Hunger was good, but I've read it so long ago I only remember the vague impression it left on me.

Both are great, but I like Mysteries even more. I haven't read his later stuff but Hunger, Mysteries and Pan are all thrilling and ahead of their time. He went a bit crackers later in life and was a Nazi sympathiser which seems to have reduced his readership these days.