I grew up with Jeremy Brett's Sherlock Holmes, by far, in my opinion, the most accurate representation of the stories.
Only in my adult life did I read the stories, finding large chunks of the dialog in the TV show being word for word taken from the stories. And when not word for word, the tone and feel of the scenes so well portrayed on screen.
Brett's Sherlock Holmes is definitely the definitive one in my book.
There is a Soviet version of Sherlock Holmes which is surprisingly good starring Vasily Livanov. The locations sometimes don't quite look like England etc, but I really enjoyed it.