I don't think they would ever play against each other. THink they would take a hit, grab their guitars and just jam and feed off of one another.
But to answer the question I am going to barely take SRV on this one. I like his version of Voodoo Child better than Jimi's. SRV didn't have the catchy riRAB that Jimi had, but then again SRV's songs were unique in that it seemed like he just picked up the guitar and improvised in every song. He really didn't have a typical song structure.
And I still am confused on why BB isn't on this list. You said he was soley a blues guitarist, however many of the guitarists on this list are strongly rooted in blues guitar and I would label SRV a blues guitarist. The only SRV song I label rock is Voodoo Child and it is a cover. Also if you look at your critera, BB King gets an A in most of the subjects. BB King strongly influenced many of the guitarists on your list and he impacted both the rock and the blues.