[FizzyWater]

Hmm, Chaz McGee started a "Dead Detective" series...but I can't remember enough about it to say whether it would fit your criteria. Two were mainstream published as Chaz McGee, and I think there were three more self-pubbed when the publisher dropped her, but she released them under a different name. I'm at work, so I'll have to look up what name it was when I get home and can check my book list.

ETA: FYI - this is not a romance series. But it's paranormal without vampires, zombies, or werewolves.

There's also the Casey Daniels series, although the tone for that is more like Stephanie Plum. Cemetery tour guide hits her head on a tombstone and starts seeing the ghosts of people buried there - and of course they all want her to solve their deaths.