What's missing? Certainly Racing Cars They shoot horses and Tich Gwilym's version of the national anthem. Also something from Yr Hwntws perhaps. How about Blodwen and Mary by Ryan Davies? Maybe things from Blodwyn Pig, Man, Heather Jones and Edward H - I'm not well up on Welsh pop.
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.