Now Schubert I would only say this. Imagine, if you can, that you are a teenage girl and you and your girl friends are in the audience at the Paramount in the early 40's listening to your idol, Frank Sinatra swooning "Night and Day". Are you ever going to forget it? Would you care whether anyone else cares what is important to you?
Whether you like Sinatra or not for whatever reason one thing is undeniable, the man worked hard at his craft and promoted it by whatever means necessary. As time went by he became a better musician because of it and he has to at LEAST be given credit for that especially after all the obstacles he encountered, divorcing his wife and the disfavor of the public after that. Me? I think he has nothing more than an average range but is the master of phrasing musically and self promotion and delusion (of the masses) at worst. One can thank Dolly for that, but what are mother's for? Ask all those American Idol participants.
Sinatra is more than about his voice, it's about the American Dream, how even mediocrity can elevate itself to something special in it's own unique way.