The only managers who progressed us were
Joe Royle - scrappy, but good players who left all on field
David Moyes - 2002-2008. Although, id argue the year we lost to Fiorentina was the defining moment of his tenure, built the best squad of my lifetime and didnt have confidence to go for it.
Roberto Martinez - 1st season. As above he inherited Moyes Squad and attacked and we bottled top 4. After that he lost the defensive quality and we folded.
Honourable mentions
Marco Silva - had the right ideas, dont think he ever recovered from Anfield where Pickford collapsed. Still think hes got a big job in him.
Ancelotti. Took lazy players and had them believing, a polished turd is still a turd though and the second half was disgraceful.
For me, we haven't progressed, have we? When the League started we were one of the "big 5" pushing for the PL. Since then, we've been in as many relegation scraps as we have European races.
Progress is improving - and for me, the only way we will improve is by regularly qualifying for Europe, winning an occasional trophy. Until then, we're treading water.