Disclaimer: I only have Kate Mosse's Winter Ghosts as an audiobook and have not finished it yet, and have not read the other two you mentioned liking, so my recs may be very off.
But you seem to like those personal stories of people just trying to live their own lives, but being caught up within a grand sweeping world-changing epic event. So on that basis, perhaps you might like to try:
James Clavell,
Shogun. While this is technically part of his Asian Saga, it can be read perfectly well standalone and doesn't directly tie into anything else.
It's thinly-veiled history, with Blackthorne standing in for the real life Will Adams, who really did become a samurai shipbuilder etc. for Tokugawa Ieyasu. And his Jesuit opponent is based upon Joaõ Rodrigues, who had a very interesting life and came up with the first truly usable Japanese/European-language instruction book and dictionary and escaped a Manchu raid at the end of the Ming dynasty. It is pretty long, but quite good, and basis of a rather good televised miniseries with Toshiro Mifune in it.
Shorter, but still good reads, are by authors
Judith Tarr and
Susan Shwartz. Tarr herself has a number of Masters' degrees in medieval and other history, I believe. No idea about Shwartz's qualifications.
But they've both written some fairly good and accurate historical adventures that are available in e-book format. Mainly Norman/medieval/Crusades and Byzantium, though also some ancient Greece/Egypt/China.
Have a look through their various listings and see if there's any with a time period that interests you. I'll warn you that Tarr's also written a couple of ones that are more weighted towards being historical fantasy romances, but those should be easy enough to spot from the descriptions.
You can read some of Judith Tarr's short stories and novellas
free on her BookViewCafé page and while Susan Shwartz doesn't keep any samples on
her website, you can read the first chapters of several books over at her author pages at
Baen's Webscription and
Fictionwise.
I personally especially enjoyed Shwartz's Imperial Lady (unwanted Han dynasty concubine sent as a treaty-offering to the Hsiong-Nu tribes), Judith Tarr's Queen of Swords (Queen Melisande of Jerusalem during the Crusades), though neither seems available in e-book format yet, unfortunately.
Some of their books have sequels, but those two are standalone, and the writing is a little lower-key (more personal focus) than Clavell.
In a similar vein,
Morgan Llywelyn's written quite a lot about ancient-to-medieval Ireland/English Isles (Brian Boru, pirate queen Grace O'Malley, druids under Roman invasion, etc.), and was fairly good in those books of hers that I've read, most of which incorporated a hefty amount of adventuring to go along with the history. I think I liked
Grania and
Druids the best of those that I remember.
If you're not averse to fantasy, both
Guy Gavriel Kay's non-Fionavar Tapestry/Tigana/Ysabel novels and
Lois McMaster Bujold's Chalion (a series, but each readable standalone, and very good, loosely Spanish Reconquista) might suit.
GGK is standalone for most books, and his earlier ones do tend to be better.
Lions of Al-Rassan is basically El Cid and very much historical adventure.
A Song for Arbonne the Provencal Courts of Love, the Sarantine Mosaic (1 story in 2 volumes) Byzantium, both a little heavier on the get-to-one-place-and-political-machinations style.
Happy reading!