Heh, I spent some time on these, but don’t use them myself as they sound like kazoos, LOL!
NP is completely unusable for jazz IMO. All of the phrasing is just totally wrong.
As primarily a saxophonist myself I’m biased, but I’ve never heard anything from any library that is really usable for saxophones. Personally, I use SWAM, but the Altos are particularly crummy IMO. The Bari is probably the best of the bunch, like this fake Harry Carney playing “Agra” straight out of Dorico with no MIDI editing at all:
Halion saxes are pretty terrible. The Soprano Sax in the default Playback Template is particularly awful as the “Soulful Soprano Sax” has a delay programmed into it. The delay has to be manually eliminated or it’s obviously unusable.
I do think the Ample Sound Bass Upright is pretty impressive if you need a jazz bass.