When Things were Rotten
Yes, I agree. “There can be only one.”
You mentioned that you liked Hamlet. I recently watched, and somewhat enjoyed, a recently made version starring David Tennant and Patrick Stewart. It’s not quite Renaissance, though, in that it includes, among other things, a certain camera motif. Still, worth a watch in my opinion.
Ken Russell’s The Devil’s is an over-the-top but entertaining look at witch trials in 17th Century France.
Perfume: The Story of a Murderer is set in 18th Century France, and follows the career of a particularly unusual serial killer.
I guess this doesn’t really count, but it’s cool anyway. Jack of All Trades
Name of the Rose was a pretty good watch.
The Taylor/Burton Taming of the Shrew and Tragical History of Doctor Faustus.
Seconding Becket and A Man For All Seasons.
Stage Beauty, my favorite movies set in Restoration England.
Second a lot of the movies mentioned already, and will add the Patrick Bergin/Uma Thurman Robin Hood as an enjoyable romp with a great cast, including Edward Fox as Prince John.
Tristan + Isolde with Sophia Myles, James Franco, and Rufus Sewell
Dangerous Beauty - set in 16th century Venice. Stars Catherine McCormack and Rufus Sewell
My favorite version of Robin Hood is the one starring Patrick Bergin and uma Thurman.
Of course, there’s Shakespeare in Love.
And King Arthur with Clive Owen and Keira Knightley.
Terry Jones’s The Crusades, neither drama nor strictly a documentary, belongs on this list somewhere.
I have a friend with similar tastes, but she runs more toward fantasy. She liked the 3 seasons of Robin Hood and the 2 seasons of Legend of the Seeker available on Netflix streaming. The first 4 episodes of The Pillars of the Earth can be streamed from Netflix also.
She also likes Merlin on SyFy.
Also in Medieval Fantasy, HBO is going to start a new series The Game of Thrones next year. They are already filming and the series should start in the spring.
For 18th century stuff, I liked the 3 part A&E mini-series The Scarlet Pimpernel.
For 17th century, I liked The Three Musketeers (1973) and The Four Musketeers (1975)
The hilarious thing is that it DOES, sort of, represent a historical period – better, at least, than many historical movies do when it comes to costuming.
For the most part, with a few departures here and there, The Princess Bride’s costumes are shockingly accurate for a twenty year (or so) period in Italy in the 15th century. I only realized this after watching the movie when I’d done some research into costumes of the period. 
I can definitely second and third a vote for The Advocate. Fanfreakingtastic. Watch out for boobies if you are disturbed (or happy!) about their inclusion. 
If you can stand subtitles, may I recomend Alatriste? Set in early 17th century Spain and its posessions in Europe and the Mediterranean.
I’ve mentioned it before: I’m a Pérez-Reverte fan and want him to keep on being paid so he can go on writing, ok? If you like the movie, it’s a smooshing-up of a series of books, several if not all of which have been translated to English. I bought my first book in the series after reading a review by a critic with bad taste who claimed “this shit is drivel, it’s as bad as The Three Musketeers” “
… Dumas the Elder, I so must buy this! :D”
Ooh, forgot to mention one of my favourite movies: Ever After
The Vikings, with Ernest Borgnine, Kirk Douglas, Janet Leigh, and Stony Curtis. Although it was largely about, obviously, Vikings, some of it does take place in England and is full of Medieval nastiness. One of my all-time faves.
Camelot? (Richard Harris, Vanessa Redgrave, from the 60’s.)
Excalibur?
Mists of Avalon?
My favorite, Merlin (mini-series) (Helena Bonham Carter, Martin Short, Miranda Richardson, and Sam Neill as a majesticallyi sexxxy young Merlin).
In my experience, even people who really like the book usually don’t like the adaptation.
The War Lord with Charlton Heston.
I’d totally watch a show called My Favourite Merlin.
I forgot to mention “The Last Valley” with Michael Caine. It is set during the 30 years war.