I think a manager has to suit a club. That's one of the big things to get right when making an appointment, especially if we want it to be a resounding success, have it lead to us over performing and not have it simply be a fire fighting job.
I think Harry suits us for example. A Londoner that wants to play football the right way, and has a style of management that lets good players express themselves. This means that he will usually get a team to play to their ability.
Guardiola suits Barcelona. He may be a terrific coach, but his skill set is getting players that have the pressure of needing to perform like the best players in the world do it every single night. Would he make a smaller club over perform? Maybe. He might bring new ideas, but it's not his proven skill set. Moyes suits Everton. A club with tight financial constraints needs to work extra hard to compensate and that's what he gives them.
Rodgers I feel suits Swansea. Spells at Watford and Reading didn't go great, but he didn't suit those clubs. However he comes into a club that already has the foundations laid of playing good passing football, and he gives them that extra edge. The club and the manager were a good fit.
Same with Martinez. I don't feel Wigan particularly suit Martinez, but he is loyal to them and sticks to his principles. However if he came here, I feel like he would suit us. Experienced in the Premier League, can speak the language, and has a preferred style of football that is crying out to be implemented on more technically accomplished players. He and Rodgers would both suit us to be honest. Both have gotten wins over big sides this season, and not by parking the bus, but by playing good football. Imagine if they had some of our players.
Wigan have gone to Liverpool, Arsenal, Chelsea and played Man United at home and deserved to win all of those matches. He can play against the big teams, he is tactically brave. Players should respect him for keeping Wigan up every year, and once they see his ideas they should buy into them. He would also be loyal to us if we gave him his chance I would say, so could be here for a long time.