Steve Lukather - by far
All great answers. My vote is Jimmy Page but am also going to throw in Jack White, young but has some serious chops.
Was- Clapton with Hendrix right there of course.
Clapton is God was plastered all over London in the 60's for a reason.
Jeff beck by far.
Doug Pettibone. He palyed for Lucinda Williams for 8 years and now tours with Mary Ann Faithful. Great licks.