They have to be pinpoint accurate historically.
Unfortunately, antiquity is very poorly depicted in television and film. I personally cannot think of any film set in antiquity that accurately depicts it’s setting. I do apologize for the short answer, but there really are none. Might I ask why you are looking for films that are “pinpoint historically accurate?” In general, film is a rather poor medium to use to understand a historical time period, especially antiquity. As an entertainment medium, plot and character development are normally given precedence over historical accuracy. Your best option are books, and there are numerous scholarly introductory texts for most topics in ancient history.
What /u/HatMaster12 says is sadly true - there has never been a "pinpoint accurate" film about the ancient world. If you'd like to learn more about what ancient times were like, do as (s)he says and read a book. Broadly speaking, the more recently it was published, the better.
That said, there are various screen depictions that have at least done some things right. The HBO series Rome is rightly praised for its depiction of ancient Rome as a crowded, filthy, noisy, wretched hive covered in obscene graffiti, in which the poor starved in multi-storey hovels while the rich abused their slaves in their walled mansions. The movie Alexander, for all its faults, includes a nearly flawless rendition of the Battle of Gaugamela, courtesy of Oxford Professor Robin Lane Fox, who acted as historical advisor. This is by far the most accurate visualisation of an ancient battle in existence.
In all cases, though, you have to take the bad with the good. Movies are made to entertain, not to satisfy historians.