Kontakt is my go to soft synth for sounds. Here is what I have that will most likely work for you:

Upright/double bass - Kirk Hunter's Diamond Orchestra. There are key switches for pizzicato and adjustments for legato. With a high legato setting you can get a bowed sound. Wait for a sale if you don't want to pay full price.

https://www.kirkhunterstudios.com/shop/

I play bass so fretless bass is "organic"!

Again the Diamond Orchestra for the harp. It has the arpeggios but you can add a tremolo effect with some free VSTs and/or use Kontakt's Rotator. I use the latter.

Orange Tree Samples Pure Jazz Vibes are great:

https://www.orangetreesamples.com/products/pure-jazz-vibes

Sampleism' PSI Marimba is also great:

http://www.sampleism.com/paperstoneinstruments/psi-marimba?sk=kt

These are my choices. I hope this information helps.

Good luck.

{edit} I forgot the FXs. I search the Internet for a given FX as there are always free ones out there. I do not buy FX samples.

Last edited by MarioD; 07/26/16 11:49 AM.
I think my wife has started to show the first signs of dementia.
She said she can't remember what she ever saw in me!

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware