George Müller (born in Germany Johann Georg Ferdinand Müller) (1805 – 1898), Christian evangelist and Director of the Ashley Down orphanage, Bristol. Well known as one who "lived by faith" (he had no salary but relied on gifts and mad eno direct appeals for funds) he cared for 10,024 orphans in his lifetime, providing them with an education that led to accusations of raising the poor above their natural station in life. He also established 117 schools which offered Christian education to over 120,000 children, many of them being orphans. More here.
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.