In search for speakers of "natural" sound

I am using a pair of Harbeth speakers. However, I am not satisfied with the 'naturalness' of the sound (it could be that I am so demanding). I am looking for a pair of speakers that can produce the more natural and organic sound than Harbeth if there is any.

I know that it depends on the amp, cables, and other variables. However, let's assume that with the appropriate gears, which speakers do you think can produce the "most natural sound"? By "natural", I mean the sound that we hear directly from musical instruments, from the singer without going through any amplification.

There is a user mentioning that speakers from the past used that 'natural sound' as a reference when designed speakers. In contrast, the sound today (even the hi-end one) is to "hi-fi". He guessed it could be less people have chance to listen to live / acoustic music than before.  

Is it right?

Thank you for your experience and recommendation!

P.S: I know that my questions are silly and dumb, please bear with me.

Ag insider logo xs@2xquanghuy147
Wow Geoff, Fulton’s! I never heard the Nuance, but did have a pair of the earlier Model J, which replaced Magneplanar Tympanis. The J’s had the great RTR ESL-6 tweeter array, a transmissionline loaded woofer, and Fulton’s Model 80 2-way as it’s midrange. Great speaker, $1200/pr in 1974.
I think my Klipsch Heresy IIIs have a surprisingly "natural" sound with my tube stuff, and I have instruments around as a reference as well as a long career as a live concert sound tech, musician, and fashion model (not a public one, just me around the house wearing my own crappy clothing). However, I wonder if it's reasonable to use yourself as a reference as really, what the hell do I know? A good reference is to make a clean recording of the ambient sound outside, play it back on your hifi rig blindfolded and then try to determine where you are...this requires plugging your nostrils so you can't smell anything.
Thank you everyone, I truly appreciate your experience and advice. Now, I know where to go from here,  I guess I will look for a used pair of AN silver E or open baffle speakers.

You should look at Revel and read this book by Dr. Floyd Toole:
"Sound Reproduction: The Acoustics and Psychoacoustics of Loudspeakers and Rooms".
The concept is you want speakers that measure flat on and off axis. 

All of your other equipment measures flat, why would you want speakers that don't?
Silverline SR17 Supreme (USD $7500). I'll have a review coming out imminently, but I believe this is one of the premiere speakers < $10k for reproducing acoustic music. Not the best at electronic/harder music, but great for e.g. classical and jazz - very organic and balanced with just a hint of warmth. Very high resolution too, without being too fussy - a forgiving load and easy to match with both solid state and tubes.