Established top names and those who fit our style and our football are: Guardiola, Klopp, Tuchel, Naggelsmann, Hansi Flick.
Established top names that do not necessarily fit our style (most of them) are: Allegri, Conte, Zidane, Simeone, Pochettino, Ancelotti, Emery, Luis Enrique (questionable), Brendan Rodgers (questionable), Mourinho (questionable).
These are probably top 10-15.
From here on, you have a bunch of other managers who are promising because of various reasons, some have more experience but didn't have their breakout yet, some are past legends who people believe they'd make first-rate managers. And so on.
Marco Rose, Xavi, Arteta, Ten Haag, Gallardo etc. Wild bets that could be the next big managers. Or not obviously.
And then you have experienced, 2nd or 3rd rate managers who have been around for a long time already at decent or even good teams while not making the step to one of the aforementioned categories.
Valverde, Marcelino, Koeman (for now), Setien, Tata Martino etc. As you can see, 4 of our namings were from this category without a doubt. Not big names, not managers with possibly great future, just decent managers with some experience under their belts.