~Snip~
That is true, if Pep or Ancelotti manages either Manchester United or Chelsea, there's no doubt that the club will enter into the top 4. But we still know that both Pep and Guardiola cannot be your coach and you as management fail to supply him the quality players that he needs. They will not even agree to the contract if you don't state how much you are willing to give them to buy players. Those guys are big names and they do big deals. They don't manage or beg the club to keep them because they got some proven record of excellence. This is just the real state of matters.
Maybe if Manchester United or Chelsea were handled by a coach like Pep Guardiola and Ancelotti, the club would not only be able to provide competition for the top four positions, but the opportunity to win the EPL would also be very big. Manchester United and Chelsea are too busy looking for quality players, but they don't try to find coaches who can manage these quality players to achieve success with the clubs they play for. Zidane still hasn't managed any club, Manchester United or Chelsea should be able to approach him to lead their squad.
A great coach will find it very easy to bring in great players because he has clear goals with the club he leads. The big names of Manchester United and Chelsea also need to be maintained so that they can always provide competition in the title race. The recent failures of Manchester United and Chelsea are due to not being handled by great coaches. Just look at how Manchester City always dominates the EPL under Guardiola direction, they should learn from what Manchester City did.