SRV was awesome, but he was somewhat one-dimensional, and I don't listen to the blues enough, for me to put him near the top of my list.
I think Jeff Beck is the best player ever, but I can't not have the four on my mountain that I picked. Rik Emmett, Brian May, The Edge and Jimmy Page all get honorable mentions from me as well.
Some might laugh at me mentioning The Edge, but while he isn't a technical player at all, his style and sound is a big reason why U2, one of the most popular and one of my favorite bands ever, are so great, and that counts for a lot.