I'm also searching for similar authors.
Other good UF books and authors imo:
The Sixth World Series by Rebecca Roanhorse
Dirk & Steele by Marjorie M. Liu
From the entire list given, the only up there quality wise, with Illona Andrews and Patricia Briggs, is Nalini Singh.
Tried all the other ones and they range from bad writing to false advertising (NOT a romance and/or character baiting).
I tried Faith Hunter's Jane Yellowrock recently but I dnf. It ISN'T a romance and
SPOILER!
No HEA. There is no relationship for a HEA to happen.END OF SPOILER,
I made a list of other authors I that were a miss for me and why (hope it helps a little).
Gena Showalter (lazy writing and false advertising)
Sherrilyn Kenyon (lazy writing, rape for "character building", character baiting/queer baiting)
Keri Arthur (no character development whatsoever, flat characters ALL of them, got into Nora Roberts' level of lazy STILL in the FIRST book)
Grace Draven (good world building and character building, after they have sex, 'though, that's the only thing they do forever and EVER)
Maria V. Snyder (the romance is like an imaginary friend, it's there... barely... if you squint)
Lilith Saintcrow (you get more plot and character development from pornhub. and pornhub is free.)
J.R. Ward (good world building and characters until they have sex, character baiting, J. K. Rowling Syndrome "aka" ruining her own books by writing unnecessary new ones, reversing HEAs "they were happy... BUT NOT ANYMORE!
)
Carolyn Crane (bad character building and development, unlikable narrator, character baiting)
Jennifer Estep (unlikable narrator, unlikable characters in general, bad at romance writing)