Anything involving Bob Anderson as the swordmaster or fight coordinator. That includes all three Lord of the Rings films, the Pirates of the Caribbean films, the Antonio Banderas Zorro films, the Highlander TV series, and a lot of Errol Flynn films.
Also you should check out the ARMA instructional videos. They’re useful for providing a functional understanding of sword fights you’ll need to write them.
For using swords, my first thought is actually Andrzej Sapkowski’s Witcher books. The fight scenes themselves aren’t that useful, but there’s some solid information scattered through the books.
We’ve got a couple questions pending about knife fights, but the short version is: they don’t happen. At least not the way they’re presented on film or in books. Knife fights are about shanking someone and wandering off, to the point that the hidden blade kills in the original Assassin’s Creed are about the extent of “realistic” knife fighting.
The best source on knives is probably from Michael Janich. He’s developed quite a bit on the subject. It’s not going to historically appropriate, but for using knives in a modern context, it should be helpful.