I'd have to say Julian Bream, Virginia Luque, Roland Dyens

by Ken
(NY)

Julian had a beatiful tone and great musicianship. Roland Dyens is always pushing the envelope as far as composers and styles go.

For a young, modern day choice I have to say Virginia Luque. Her youtube videos are amazing. Her interpretations reflect outstanding technique AND musicianship - ie, she seems to interperate every note and phrase with her own particular style. Not overbearing, or in your face, but contextually just right. Also, I hear she plays with short nails which may help account for the unique sweet tone.

Im not sure she's as known (at least not yet) by the public, but Id imagine she will be at some point.