What worries me about FDB is his lack of adaptability, In games against Red bull Salzburg, Zwolle and Psv the oponnent decided to press high and counter, he couldnt find an answer for it, still can't. Maybe its because of the players it can't be overcome but he should tactically have been able to stop the attacks, especially Salzburg, those games could have ended 8-1 both times, he also doesnt seem to be able to deal with troublesome players or individuality(e.g. showboasting).
Therefore he remains a questionmark for me regarding being capable to train a European powerhouse.
Most names on the list don't seem suited to me, there is only Pep who is unavailable.
Klopp doesnt suit us, Mourinho is a disgrace and I will stop supporting the club if the translator ever would be in charge, Koeman has the perfect history but is too much a flavour of the month type pick with his Valencia debacle in mind, Wenger doesnt win big games and trophies, Rijkaard is retired, as is Heynckens etc. etc. no suitable realistic option at the moment to be honest.