You don't get into Bundesliga's team of the season if you are average.
And frankly i'd be happy with an average, solid CB who does his job. Look at what Leicester did with 2 "average" CBs. Meanwhile City spunk £30-40m every season on "world class" CBs who make error after error.
The way fans rank CBs seems disproportionately weighted to "ball playing" CBs like John Stones. 2 big lads at the back who can win a header, fight with a Troy Deeney, and score the occasional header, that's all I want