I think its difficult as the things you need from a candidate are ones that we as fans aren't necessarily going to see. Its the things they do behind the scenes and just as importantly the team they have around them and what they do behind the scenes.
What made Wilder and Knill such a success was Wilder's man management and ability to turn a group of players into a team. But he wouldn't have been as successful as he has without Knill being alongside him working on the coaching and creating those memorable free kicks.
The only things we can go on are their win rates, their results in comparison to their expectations and personal opinion.
One that does seem an obvious choice is Pete Wild at Halifax. They are currently top of the table, hes been there since the summer and has had 2 caretaker spells at oldham which he had high win rates at.
Certainly says the right things....very refreshing to hear!
https://www.halifaxcourier.co.uk/sport/football/fc-halifax-town-how-pete-wild-has-guided-the-shaymen-to-the-top-of-the-national-league-1-9977040