Klopp. He has accomplished genuinely impressive things at Dortmund and Liverpool. I don't think Tuchel measures up against Klopp and Pep, and Pep has never had a challenging job. Every moment of his career, he has had the strongest squad in the league. He has never punched above his weight. His accomplishment are par for the course. No one can say he hasn't done well with what he's had, but you would have to be decidedly incompetent to not succeed when you literally always have the best tools in the business. Before I can rate him as one of the true greats, I'll have to see him succeed with something less than the best squad in the land and the most money. If he can go to, say, Tottenham and win the league, I'll give him the nod. But he won't even try it. I get the distinct sense that he refuses to take on any job where success is not essentially guaranteed. He wants easy, automatic trophies, so I can't rate him as one of the very best.