Best manager criteria is depends on how people judge it

I'm Arsenal supporter yes and maybe has biasness

for me is AW..as a HUMAN point of view

he can win trophies with small stadium, and winning double in the first full season.

he can win double with small transfer kitty

he tightly hold his principal to his football style even people criticize

he engineered the move to 60k emirates from small stadium

he has so much love towards arsenal