I used to really be into urban fantasy novels. I read the Dresden files all the way through Skin game, and the first three books of the Iron Druid series, plus a bunch of other stuff. Lost interest after a while though, because it's a genre utterly dominated by Buffy fans who just wanted to write shitty novels about "exotic" looking women who banged werewolves and vampires, and were "complicated". Every single cover for these books follows the same layout. Some brunette or redhead, in leather pants holding a sword with her ass facing the audience. "Book one of the shadow slayer chronicles!" "Book three of the Dark hunter chronicles!" "Book seven of the otherworld warriors chronicles!" "Book ten of the dark-night-shadowy-bad stuff killers of evil stuff bad. things. good."
(They're always chronicles. Although I guess my complaint about the covers is unfair. Sometimes they're dudes with no shirts on, with their heads cropped out of the picture.)
Anyway, those Anita Blake books are especially notable (not least of which because of that article you linked) but because the first four or so were presented as crime procedural fiction with a supernatural twist, but around book six, the author lost her mind and just started writing them as hard porn. It's like what if Olivia Benson from Law and Order SVU gave up on being a detective midway through season five and started f*****g random strangers she met on the street in order to solve her cases? Real jarring. It's never even normal sex either; there's one novel in the series could basically be summarized as: "Anita is locked in a room with four werebeasts for three hundred pages for reasons. Enjoy."
It's still more diverse than the Dresden Files. One black main character in fifteen books and he only appears in four of them.