Florentino Perez is all powerful,he's proven that over the past few years.
As for Klopp, in my opinion, he's among the top 3 coaches in the world, and i think he would turn Real into a true european beast. Ancelotti and Zidane have done an incredible job, but i believe Klopp could take it even further. It's up to us to wait and see.
Klopp’s never managed a team that is always a favourite, where the pressure is so high to win with very little room for failure. At Dortmund and Liverpool he competed against teams that spend much more money than he could. He was given time to build a team at both Dortmund and Liverpool, he would not get time or any leeway at Real.
It will be really interesting to see how he does at a club where he is allowed to spend a lot more money. I don’t think he will go to Real Madrid but would be fascinating if he does.
I also wouldn't believe this rumor too much plus Jurgen Klopp just took over as Global Sports Director at RB Leipzig. So it's quite difficult for him to return too soon to a big European Club to take the coaching seat. But when talking about pressure, of course holding a club as big as Madrid is a bigger and more challenging demand. Back to Klopp does he want to feel that challenge again and get out of his comfort zone?