I have to go with Jeremy Brett.
He was the best.
I agree about Jeremy Brett. In my opinion, the Granada series (41 episodes) was by far the most faithful adaptations of the original Doyle stories. Everything was presented in late 1800’s England ... no automobiles or other modern gadgets.
Brett studied Holmes and, most agree, became Holmes on the screen. Every mannerism, gesture and tone was backed up by the original stories.