Too young to have seen Colin Bell but my dad still gets misty eyed talking about him despite seeing some incredible players at City so I'm gonna pick him. Of the generation of footballers I've seen then sadly it's Gerrard or Rooney. Both were incredible and although predominantly known further forward up the pitch could be as good at centre half as Harry Maguire.
I'd rate them slightly ahead of Phil Foden as all rounders only because they are a bit more physical which you might want at centre back although it swings and roundabouts cos I think Phil would be a better full back then either of them. But Phil is hugely underated by most non City fans in my opinion. Next year if he plays central and stays fit then I'm expecting big things
John Stones is undoubtedly the best all round footballer in the current England team. He has technique, physicality and brains.
Although I have other favourites Yaya is probably is the best all rounder I've seen at City but again probably rubbish out wide