Bassist: Gary Karr (one of only a handful of upright classical players to succeed as an international soloist on the instrument).  I have spent years seeking to emulate his bowing/tone, and his intonation is fabulous.
 
In terms of a bass: my preference would be hopelessly out of my price range.  I am thankful to have a solid wood carved bass (non-plywood) that sounds quite decent (a person who had it before me treated it brutally, so it has "issues" and "potential issues" and I got it fairly inexpensively as a result, several years ago).  But the sort of bass I would like (drool over) would now be in the $25,000+ class, either French, or better yet, Italian, from about 1850 or so (I do know what sort of sound that type of instrument has).  But again, I am very thankful for what I have, and it is better than I would have expected to get, given my circumstances.

Ok: to answer a humorous question seriously, or is that ... humorous question, seriously?
 
Oh, and dulcimer player or model (assuming mountain as opposed to hammered):
 
Player: no clear idea.
Maker/model: Blue Lion - wonderful tone, and the string length is quite reasonable (and compared to classical upright bass the dulicmer is sooooooo much easier to play).

And I must ask: did someone harm Monica?

Danny Thompson.

jamesg1213
Danny Thompson.

That's a bass???
 

 
I love my US Fender Jazz.
 
The slim neck profile down at the nut makes it a joy to play for someone with stumpy little fingers (like me).
 
 

I'll say Jack Bruce because I happen to be in the middle of reading his biog "Composing Himself".
 

I actually had a hankerin' for a custom Eccleshall 335 bass many moons ago.  Even talked with Chris Eccleshall about it once...
(But lack of funds and need Cure'd that - pun intended for the Simon Gallup fans out there.)

Bass Cowbell (with mute)

Before I answer you I have a few questions.
 
How many kinds of basses did Juan make?
Why can't I choose more than Juans'? Are they being given away?
Where did you hear about this?
How long do I have to make a choice?
Do I get to play them or just Juan?
Will I get to play Juans bass or have to go with pic(s)?
Is there shipping charges? Will Juan take care of that if there is?
Does Juan make basses or is a middleman?
 
Forget it. I have a bass and it plays fine.