..Jeff Beck was not the greatest guitarists ever. His playing was technically proficient, but very lyrical. His compositional chops were very strong and he experimented with new styles as he went through life.
While I don't own all of his stuff, I do own a bunch and enjoy all of them. I look forward to getting more.
I will say two things:
• No recordings sound better on vinyl unless you enjoy noise and distortion
• Jeff Beck was mellower as he got older, according to a few accounts. When he was young, more than a few of the guys that had played with him didn't have much complimentary to say about him as a band leader/boss.
As to the greatest guitarist ever, that's Allan Holdsworth. He was in Tony Williams Lifetime for a few years and then in UK with Bill Brufford, John Wetton and Eddie Jobson (Google them). After becoming friends with Eddie Van Halen when UK opened up for them for a couple months on VH's 2nd world tour, Allan left UK and was thinking about chucking it in with music. EVH helped get him his first solo recording contract.
Of AH:
• "I've tried to incorporate anything he plays into my playing. I can't do it. He's the greatest guitarist ever." - Eddie Van Halen
• When proclaimed to be the GOAT by Carlos Santana, a journalist asked, "Doesn't he play jazz?" The reply? "You can call it what you want, but if you try to play his music, it will fry your brain."
• Guitar Player magazine stated, when he was on the cover, "Allan Holdsworth - The Man Who Changed Guitar Forever"
If you are wondering why you haven't heard of him, I think that's the way he liked. And, as things sometimes go, he was more popular in Japan and Europe than in the States. He was a very low key guy. Being famous wasn't his thing. He just loved playing his music.
A small label from California (Manifesto) remastered almost all of his albums and have also released a bunch of live DVD/CD concert packages.
With AH, EVH and now Beck gone, the guitar world is not nearly as bright as it was.