[Hesperus]

I would have to go with Jeremy Brett (the man, the myth, the legend, as they say). His performance in the Grenada version was unreal, especially given what he was dealing with at the time. I will say though, that Benedict Cumberbatch makes for a good modern!Sherlock. In fact, for a modern adaptation, I was rather surprised by how many thing the BBC version got right / that seemed to make sense (dominatrix Irene Adler anyone?).