My favorite would have to be Jayne Ann Krentz. She writes contemporary-era stories (often set in Seattle). Under the psuedonym Amanda Quick, she writes Regencies which would no doubt drive Wendy insane

Under the pseudonym Jayne Castle, she writes futuristic/sci-fi themed novels.
Her heroines are all spunky and interested/expert in various quirky things. Her heros are all a bit dark but only in a sexy way, they're all smart, and they adore spunky and intelligent women.

One or both of them have large extended families who pose various problems. Her later books tend to have various paranormal elements.
As you can tell, her stories all tend to resemble each other.

There's definitely a formula going on, but hey, I enjoy the formula, so they're a safe bet.
PJ