Ferguson at St Mirren.
The big problem with that though is times have changed, managers generally got more time back then as you didn't have social media ramping everything up.
True, times have changed and maybe patience is a thing of the past, but the general principle here is the same
In football, the more money you have and the better players you have, the more likely you are to win games. On the flip side, the less resources you have, the less likely it is you'll win regularly. If all we do is focus on the end results, we will always judge the managers of the weaker clubs as being of a poorer standard. Graham Potter would be a great current example. If you judge him purely on his results during his tenure at Brighton, you couldn't make a great case for him being ripe for a move to a bigger club, it's the other stuff that surrounds it which clubs need to analyse and decide whether the skill sets those managers have would translate into giving that manager a good chance of being successful with greater resources.
With every manager at a "lesser" club, judging them solely on results is only seeing a small part of the picture.