Flamencology
You don't deserve koa.
Saint touched on the idea of it being limiting that we're only looking at guitarists. But I'm totally with you. Most of guys I picked were players that I think about as song guys that happen to play guitar and the "jamming" would hopefully be more creative than an E blues. Frisell might be the exception, in that it would be awesome to jam over tunes with him, but more like the Lennon, Dylan, Young, etc. songs that he makes his own as opposed to jazz standards (at which I more than shit than other stuff).
Thing about Frisell is that he's the wizard at making other people look good. Ideal accompanist.