A - Pep.A - Pep.
B - Arteta, Emery.
C - Slot, Ange, Ten Hag.
D - Silva, Howe, Iraola, Glasner, Frank, Lopetegui.
McKenna, Hurzeler, Maresca, Martin.
E - Dyche, Nuno, O'Neil, Cooper.
Something like that. I don't know enough yet about those managers in the dead zone between D and E to judge properly yet but the former three are closer to D than E and Martin is closer to E than D.
I think that the managers in C are all on the periphery of either B or D too.
B - Arteta, Emery, Slot.
C - Ange, Silva, Iraola, Howe, Nuno, Maresca, Hurzeler and Frank.
D - McKenna, Glasner, Lopetegui, Ten Hag.
E - Dyche, O'Neil, Cooper, Martin.
Maybe something like this now? It's hard to do a rating really as I want to try and be fair to recent management experiences and also their history as a manager so some people like McKenna may be slightly worse and others like Maresca/Ange/Ten Hag may be seen favourably.
The C/D zones are quite close with a gap between the B to C and the D to E.