JLA: A League of One is very good, but it loses out to Hiketeia in that the story isn't really tied to Diana—it could be repurposed to just about any superhero.
I view Dead Earth and Earth One as pretty much trash, totally missing the point of Diana in far too many ways, and antithetical to her values.
Tempest Tossed was fine, but I think it failed to actually do and say something meaningful about Diana. She was too little of an active agent in the story, and the actual threat was more suited to Batgirl or Black Canary than Wonder Woman. Not that I ding street-level stories, but then I at least think they should produce some actual moral or ethical dilemma for Diana, or say something interesting about her.
Diana: Princess of the Amazons was delightful, and one of the best depictions of Themyscira I've read.
The Spirit of Truth makes Diana far too impersonal, and totally misses her empathetic side.
I haven't read Warbringer. I started on the novel, but it didn't work for me.