Finest I've experienced would be Wilder first, with honourable mentions for Warnock and Kendall. None of them were consistently amazing, but they all brought some good times.
Hecky, Macca and Jack have done well turning around a situation that was drifting.
But I think it is natural to give additional kudos to a manager that has the task of building a team.
Wilder did an excellent job of this as a number of those in League One, like Fleck and O’Connell were able to make the step up to finish 9th in the PL.
Likewise, Bassett and Taylor fashioned a third division forward line of Deane, Agana and Bryson that didn’t look out of sorts at the top level, though admittedly Agana’s time was then curtailed by injury.
I’d say they edge Warnock simply because Warnock took us up one division, not two, in a longer time period and also didn’t manage to keep them there, though I can appreciate he can point to many sub plots - Tevez, Jags handball for a pen though didn’t get one at the other end when bundled over against Wigan, Unsworrh refusing to take that second pen against Blackburn despite him being the expert, only to return and score the killer blow.
I started watching at the end of Porterfield and beginning of McEwan so can’t really comment on that as too young.
One thing is for sure, the chance is there for Hecky and team to eclipse the above if they make the right moves.