Pep and Zidane only coached a top club because of affiliation. Klopp went to Liverpool after Dortmund, where he won the league and cup there. Potter has potential but he still needs to take an extra step before coming to a top club in the pl
I won't discount the fact that previous association gave Pep and Zidane the chance to get in but that's not the important aspect in this discussion, it's what they did after getting in that's important. We can argue about whether their standing a much loved legendary ex players gave them the authority to impose themselves but the fact remains the same, they proved themselves when they were relatively young.
We have taken the established manager route before and I am not declaring that just because Jose and LVG failed here so an established big name manager will never succeed here, no I am just looking at the names around and save for Enrique they all carry some form of buggage or they are not system based coaches who play a particular brand that we'd enjoy winning with.
Like I stated before, for me the main factor for a manager is not his CV but his ability to impose his style on a team successfully. I think you can look at say Potter or Ten Haag from Villa and conclude that if this guy gets the backing that Ole has received he can stand toe to toe against the big boys as we have seen them stand up to them with less resources.
The problem is that you leave such a manager to go to say Spurs, if he does well then he is untouchable for a few years as the Glazers won't pay off his contract and the other young promising managers are all taken. Plucking Potter from Brighton is considerably easier than doing the same from Spurs or Arsenal. He is the kind of guy that goes to Arsenal and gets them to take our CL spot away.