Paul Denniston
From The Arthur Conan Doyle Encyclopedia

Paul Denniston is an American actor who played Dr. Watson in 2013 in the play Sherlock Holmes in Brentwood: The Speckled Band, in 2014 in Sherlock Holmes in Brentwood: The Blue Carbuncle, in 2017 in Sherlock Holmes in Brentwood: The Red-Headed League each time with Rob Arbogast as Sherlock Holmes.
Theatre