I'll have to check out some of those films that you suggested. As for Richard Burton's portrayal of Alexander, it was well-done and believable...and it's mind-boggling to consider that the film was made 50 years ago. It's the best portrayal we have of Alexander on film.
Yes, Stone's film made it clear that the Macedonian conqueror vanquished a huge Persian force. The film is worth one viewing, just for the battle scenes. Otherwise, it's a poor movie all around.