Other than the obvious ones mentioned so far...
Of the little I've watched, the one that has impressed the most is Imanol Alguacil of Real Sociedad. The team is balanced, strong defensively but also with an emphasis on possession and attacking. I saw a good balance, a well organised side in the recent league game v Celta.
With the money in football, there'll always be people looking to do a good job and be involved, climb up, it's an impression rather than reality that there are no outstanding candidates. There are outstanding candidates, if you're good enough to know what to look for, regardless of the trophy count.
Edit: It is seriously impressive for me, when you take a closer look, what Sociedad have been doing for the past 6-7 years. Sustained overperformance.
De Zerbi's sides lack the requisite balance, control, ability to be put under pressure for long periods, he's got to work out his approach better. Mentioned him in the Serie A thread when he was doing interesting things for Sassuolo, know his work well, but he's got some things to iron out still imo.
Alonso looks spectacular what he's doing with Leverkusen but haven't seen full matches to assess properly.