I would say that only Jose at Porto actually made a club CL quality; the others were bought into established CL clubs. Not saying they are not any good, but they had their up ups and downs before getting a gig at bigger clubs. I include Poch in that as well.
Maybe Silva has the ability to do what you reckon those did? (But actually didnt).
I just think he like the majority of managers in world football have a glass ceiling.
Him and Nuno at Wolves are good playing their own game but dont have the nous the very best managers have of adapting to certain situations either during or before kick off.
I saw it a good few times last season when teams switched it around Silva struggled to adjust likewise against the sides who came out trying to combat our tactics.
Nuno is the same its why they are so good against the better sides who focus on their own game whereas they struggle against the teams who line up specifically to combat Wolves set up.
Silva is still young so hopefully he develops and learns whilst at us but I think in football you largely get what you pay for and we are rightfully at present in that 7-11th group and will be until we unearth a Poch/
Moyes bargain or have the £££/ambition to target a top tier manager