FWIW: I wonder what J. Edward Bromberg's "Charlie Chan" interpretation would have been, if Sidney Toler had not been selected to carry on the role of Charlie Chan?
I think Mr. Bromberg would have made a very interesting choice. He certainly had the "build." His voice was certainly more mellifluous than Mr. Toler's rather monotonic delivery. (No criticism--it worked just fine!!!)
I like Mr. Sen Yung's pairing with Mr. Toler. They complemented each other; whereas, Mr. Luke complemented Mr. Oland. I couldn't see their roles working if reversed.
I think Benson Fong performed well as Tommy. He meshed well with Mr. Toler and also worked well with Mantan Moreland. (But then, who couldn't work well with Mr. Moreland?!)
It is interesting to see "The Feathered Serpent" with both Mr. Sen Yung and Mr. Luke together (#2 and #1 son, respectively) with Roland Winters as Charlie Chan. Mr. Winters' interpretation is his own and holds up well, I think.