Don’t expect to get Saucecraft-level traction on this, but it may amuse someone else as much as it has me.
While poking around Spotify looking for 1960-64 tracks to add to Martin’s Spotify post I came across 3 whole albums of 50s/60s/70s advertising music – not jingles, but whole numbers that sound like outtakes from Oklahoma – made for the likes of Coca-Cola, Westinghouse, Oldsmobile etc. This was obviously a huge thing, with massive resources thrown at it – not hard to imagine all those Mad Men brainstorming sessions. One bloke with a laptop could probably do it now.
Just search on The Golden Age of Industrial Musicals for over 3 hours of this stuff.