Tough one! If it has to be out of the box, maybe Spitfire Chamber Strings. There are some bad samples in it though, some noises, out of tune samples etc. Quality control unfortunately hasn't done their best job on these in my opinion. VSL Synchron Strings is another options. The pizzes are a bit muddy, but certainly useable. What I would use in such a case is a group of layered Berlin Strings Solo Bass samples.
I posted a short pizzicato comparison with various libraries here:
****************************************************** Edit 22.12.2021: Let me add Sonokinetic Orchestral Strings to the examples. I find them to bring something new to the table that none of the other libraries have: Sonokinetic OS 'focused' mix Sonokinetic OS wide mix To my ears...
vi-control.net
You might not be interested in all the blurb I wrote in that thread, in which case just the audio examples may be of use to you.