Since this place is all about chord progressions, here is a PDF article discussing The Greatest Chord Progressions if anyone might be interested.
Great Chord Progressions
It’s great. Thank you very much!
Interesting pdf, will spend some more time with it.
Could use a little proofreading, though. Page 8:
“One basic rule of songwriting and composing in general is that music awesome works in groups two and four bars.”
Say what ???
Sounds like it was translated. 
Maybe they meant “awesome music works in groups…” 