I understand what you are saying but I can't agree with everything you say. There are many great tunes that are carried by great harmonica playing. I saw Benny Goodman live and had no problem with his clarinet sound. Ukeleles also have the sound of a high pitched guitar and I have heard fantastic performances. Even though you didn't mention it I bet you also don't like Melodicas. Donald Fagen has played some memorable Steely Dan lines with it. It reminds me of a friend of mine who loves jazz but can't stand any saxaphone playing because they all sound like Kenny G to him.