Cassie Palmer series by Karen Chance
The Fever series, by Karen Marie Moning (5 books) plus spin off
The Georgina Kincaid series, by Richelle Mead (6 books)
The Night Huntress series, by Jeaniene Frost (7 books)
The Agent of Hel series, by Jacqueline Carey (3 books)
The Parasol Protectorate series, by Gail Carriger (5 books)
The Kitty Norville series, by Carrie Vaughn (14 books)
The Crimson Moon series, by L.A. Banks (6 books)
Banks is best known for her 12-book Vampire Huntress Legend series
The Dante Valentine series, by Lilith Saintcrow (5 books)
The Graywalker series, by Kat Richardson (9 books)
The Joe Pitt series, by Charlie Huston (5 books)
The Bloodsucking Fiends series, by Christopher Moore (3 books)
Magic Ex Libris, by Jim C. Hines (4 books)
Larry Corriea's Monster Hunters International series
Sandman Slim series by Richard Kadrey
Eileen Wilks' Lupi books
Chloe Neill's Chicagoland Vampires.
Jennifer Estep and her Elemental Assassin series
Faith Hunter's Jane Yellowrock series
The Weather Wardens series by Rachel Caine
The Calliope Reaper-Jones series by Amber Benson
The Twenty-Sided Sorceress, by Annie Bellet (7 books)
Jane Yellowrock, by Faith Hunter (10 books)
The Nightside, by Simon R Green (12 books)