Matthew Gregory Lewis 1775 – 1818 was an English novelist and dramatist, often referred to as "Monk" Lewis, because of the success of his classic Gothic novel, The Monk. It's not a novel I have read or probably ever will read but I am aware of it significance and thought Jamaican born Lewis deserved a place in this list.
Bonhoeffer uses a similar phrase 'worldly Christianity'. It's J Gresham Machen that I want to line up most closely with. See his Christianity and culture here. Having done commentaries on Proverbs (Heavenly Wisdom) and Song of Songs (Heavenly Love), a matching title for Ecclesiastes would be Heavenly Worldliness. For my stance on worldliness, see 3 posts here.