If you're looking to find a new manager, you have to look at what you require at the club and what a given candidate will actually bring.
The things Zidane won at Madrid are irrelevant, because he doesn't bring those trophies with him. Same with any other manager. You can draw some idea as to their approach from those successes but it's the approach itself you have judge.
Are they hands on coaches? If so, what sort of style of play, formations and structures will they be implementing? What will their team look like in terms of build-up play, progression, creation, attacking & defensive transitions, high/mid/low blocks, set-pieces etc? Or, if they're managers who delegate, who will they be bringing with them to delegate to? What's their approach to the above? Beyond coaching, what's the manager's approach to youth players? What profile of signings do they look for? How suited is our current squad to their ideal set-up? Etc, etc.
The devil is in the details. The actual processes of the regime they'll bring with them are what should determine who you hire, because they're what will determine whether they're a success or not. Not how big a name they are, whether they're a "born winner" (which is a meaningless cliche), whether they happen to be one of probably several people who are better than our current manager or whether they're one of several people who definitely have a better CV than our current manager. "I want Zidane because he's won the CL multiple times, unlike Solskjaer" means a lot less than "I want Zidane because his teams play like X, he will improve our coaching in terms of Y, he usually sets up in Z formation which suits us because...."
When I see people basically saying any of Zidane, Conte, Ten Hag, etc. will do it suggests they don't really know what they want as those are all very different managers.