I too would love O'neil or Mark Hughes but the reality is neither would come to us.
Id be happy with a SOD or Davies. Not too keen on Jones, he spent quite a bit of money at Cardiff and didnt do the business, despite having one of the best squads. Davies is my first choice. But in dreamland when Im given 2 billion quid by my secret father (sorry dad) and I buy Bristol City I would aim for O,Neil or Mark Hughes.