I would put Santarelli up there. Haven't you watched what He has done with Croatia at last ECH? Literally unknow names in one team and they had played so good against Turkey.
Egonu alone improved under his wings, She is way better in defence, less errors in attack and She become way faster with her approach.
Fahr is one more player.
He is the brain behind Conegliano, especially Conegliano block-defence.
Not that I wasn't expecting a different comment from you, but talking about Croatia yes he had a good match against Turkey, but what about Challanger Cup the same year where they lost against all similar level teams (Canada, Czech Republic and Argentina)?