This article was inspired by seeing so many best guitarist polls which never come to an agreement. I'm not saying this article is the be all and end all, everyone has different opinions and will disagree, yet some lists can be considered void because they do not consider all the criteria. Here's what they should consider.
NB. The suggestions of the best in each category are my opinion so it's there. Don't give me stick for it please. Most of the names are relatively famous, on the asumption that you can't quite the best if you havn't made it big. (And because of my lack of depth in rock music knowledge)
Technical Ability
The most obvious aspect of judging a guitarist, yet mistaken by many to be everything. Technical ability can be classed straight forwardly as how good a guitarist can play things, but not how good he/she is overall.
Steve Vai - Practiced 10 hours a day, enough said.
Yngwie Malmsteem - In Zakk Wyldes words: "Everyone wanted to be like this guy."
Jimi Hendrix - Comes first on every poll, and since tech ability is many people main consideratio, he must be good.
Less Is More
It's great if you can play 16ths at 200bpm, better if you know where to leave your notes out. Having the control not to show off all the time is a difficult trick to master.
Dave Gilmour - Probably the master of this.
Paul Kossoff - Listen to the All Right Now solo.
Kurt Cobain - Comes under this because he probably couldn't do more, but if he could, he wouldn't anyway.
Influence
You gotta be good if you have everyone else trying to be like you surely. Being remembered after your hayday is the hallmark of a good musician, that's why we call Bach, Mozart etc great. 300 years and people still listen to them.
Eric Clapton - Cream pioneered the 3 piece, wah-wah, 70's blues rock, etc.
Tony Iommi - Invented heavy metal.
Kurt Cobain - Made Generation X slam out teen spirit on crappy acoustics.
Pete Townsend - Invented punk and along with bassist Entwhistle, pioneered the stacks whilst having competitions to see who could be the loudest.
Sales
Formula is simple: you sell = people like you = your good.
PS. theoretically Michael Jackson's guitarist (whoever he is) should be second here for Thriller, (and Billie Joels should be fifth) but it ain't quite rock and roll is it?
Joe Walsh, Glenn Frey - The Eagles Greatest Hits is the best selling album ever.
Dave Gilmour - Pink Floyd's The Wall sold 23 million.
Jimmy Page - Led Zep 4 sold 22 million, the best rock album ever in my opinion.
Angus Young, Malcolm Young - Back In Black sold 19 million.
Originality
If you come up with something new all by yourself, your clever. Two many guitarists fall in to the trap of copying each other, but it's the original guitarists that stand out and deserve credit.
Tom Morello - How does he make all those wierd sounds?
Eric Clapton - Before The Bluesbreakers album it was near sacrilage to use so much distortion. Studio engineers loathed him!
EVH - The tapping, the shredding. Van Halen's first album really is the defining moment where the 70's became the 80's.
Speed
Speed impresses on the first listen, and it takes hard work, strength and patience. If you can be very quick you must have been working hard, and thus deserve credit.
Steve Vai - Statistically, the fastest ever. 28 notes per second I think.
Kirk Hammet - Constantly fast, even if not statiscally.
EVH - Invented shred.
Best Of Both Worlds
Finding the correct balance between speed and melody is even trickier than doing just one. A great guitarist can impress but also move someone.
Jimmy Page - In my opinion, the best at this skill and thus the best ever.
Eric Clapton - A little more melodical than Page, and a Page album released tomorrow would be better than a Clapton one.
Slash - Underated or overated, but rarely put in context. Sweet Child O Mine shows perfection of this technique.
Jimi Hendrix - Genius.
Discipline
A disciplined guitarist is one who doesn't try and drown out the best of the band, all those mentioned below have let fellow band members take center stage instead of themselves, and that takes skill. Of course none of these mentioned below could be considered the best guitarist, but certainly good ones.
Scott Gorham, Brian Robertson - Worked together in perfect tandem, never missing a note. Also, often stood back to let Phil Lynott take centre stage.
Malcolm Young - Big brother to Angus but let him have the lead spot because it interfered with his drinking. Listen to AC/DC's live album and you can hear how much louder Angus is. Malcolm could have so easily cranked up the volume, but didn't.
Song Writing Ability
The most debatable area, but for arguements sake my suggestions have all written songs which will probably still be listened to in 50 years time. I have included this because you may be quiker than Steve Vai and more controlled than Dave Gilmour, yet you will get nowhere, or deserve to get nowhere, if you can't write a great tune. The best in this category are those which could write a great song without knowing the A-Z of music theory and without sticking minoraddsus7 chords in their songs.
John Lennon - Along with McCartney is considered as the best. Macartney was reall a bassist in the Beatles day so he doesn't count in the guitarist list.
Kurt Cobain - Just battered the hell out of whatever guitar he had and it worked, brilliant.
Pete Townsend - Taking bout my generation...
I don't know what the tenth area could be, amke suggestions yourself and debate on each of the 9/10 areas. Thanks for reading...