Hm… that’s a surprisingly hard question, actually.
Perez, Rucka and Simone’s runs have all been roundly celebrated, and deservedly so — they represent the Wonder Woman book at its best. (Although, personally, I feel that Simone’s run is somewhat overrated; while she’s written some of my favourite Wondy moments, she’s also written some things I hate. I love the early part of her run, but I’m more ambivalent about her later stories.)
There were four main Wonder Woman writers between Perez and Rucka and, frankly, I think they’re all appropriately-rated.
William Messner-Loebs, John Byrne and Phil Jimenez all contributed some important things to the book in terms of new characters and plot developments, and Byrne and Jimenez told a number of good stories, but with all three of them the good stuff goes hand-in-hand with a whole lot of NOPE. They all wrote some pretty atrocious things.
There are certain Byrne and Jimenez stories that are worth revisiting, but I wouldn’t bother rereading their runs in their entirety. WML’s run, I’d probably only re-read for the lulz (there’s a lot of hilaribad writing in there).
Eric Luke’s brief run is almost entirely forgettable. I think the only lasting thing he contributed was the Themysciran Embassy, which Diana established in his last issue.
Between Rucka and Simone were Allan Heinberg and Jodi Picoult. I’ve only read a bit of Heinberg and nothing of Picoult — this was the era of Agent Diana Prince and Shamazons, both of which I hate, so I kinda steered clear. From what I’ve heard, neither run is particularly amazing.
After Simone came the #600 relaunch with the crapsack-world AU story arc. Again, completely forgettable.
So bearing all that in mind: whose is the most underrated run?
WML, Byrne, Jimenez, Luke, Heinberg and Picoult— I don’t think any of them really deserve any extra credit. So… maybe Perez? I mean, I know that sounds weird — he is widely celebrated as the creator of the modern-age Wonder Woman — but I think it’s easy to forget just how formative his run was.
He and his collaborators did such a brilliant job of reinventing Wonder Woman, building a complex history and society for the Amazons and drawing extensively on Greek mythology. He produced some great reimaginings of classic Wondy villains — his Cheetah in particular is fantastic. He established Diana as an ambassador and dealt extensively with her mission of diplomacy and Themyscira’s entry into the global community. And whereas today’s DC writers and editors shy away from calling Diana a feminist, Perez regarded feminism as being central to the book and the character and focussed heavily on female friendships and relationships. Oh, and he told some really awesome stories.