[FizzyWater]

If you like mysteries as well as sci-fi, you might consider The Disappeared by Kristine Kathryn Rusch. It's the first book in a series, but you'd know by the first one if you like the basic premise enough to read more of them. The main character is initially on the police force, so the first one reads like a police procedural. The big theme of the series is Earth's interaction with other planets' cultures and laws. There's also a personal storyline for the main characters. I really liked this series, although I'm not sure it's really in line with the books you listed as having enjoyed.

The first...7 or so?...were released by one of the BPHs, but they dropped the series. Now she's made them all available, plus at least a couple new ones, on Smashwords.

She also has a series that begins with Diving the Wreck. I thought the basic storyline sounded really interesting, but she's writing it in first-person, present tense, and that's a deal-breaker for me. I couldn't get beyond the first couple pages.