I strongly prefer Peter Cushing as Holmes. Having typed that I also strongly prefer David Burke, the first Watson in Brett series Sherlock Holmes.
Mr. Cushing was less "over-the-top" than either Mssrs. Rathbone or Brett. Late Victorian middle and upper-middle class "men of trade" I have always believed were reticent almost to extreme. Histrionics, to my mind, would not have been a trait of Holmes or Watson's.
Earlier video actors portraying Holmes I have not viewed, so I cannot comment on any of these portrayals.