Prior to YT being the default source of instructional materials for, well, anything, I spent a fortune on DVDs from Lick Library. As the web expanded there are now an amazing range of guitar vids from a huge range of generally competent guitarists with a range of tutoring skills.
… and then of course there are the ‘pros’ who have a track record and play guitars for a living who also bring out the odd video (Gilbert, Petrucci etc)
I’m always sceptical with the ones that start “wasting your life practising scales and reading theory ? With my approach you will be able to play any scale / chord in any part of the neck and solo over them at 320bpm after only 25 minutes practise”
I had a quick look at Brian Kelly’s site, and it appears to warrant further examination, (although he does have a touch of ‘mastering this is easy’ and ‘musical theory is simple’ approach) and I will be studying it in more detail…
I have only looked at a tiny, tiny fraction of such web materials, but I do have some personal “stand outs.” who are both exceptional players and talented teachers.
However, it’s a mugs game attempting to rate guitarists, because any comment is likely to bring the trolls down on your head, and there are so many incredibly talented players of the past and now here and today. So this is my own personal view and will be different to anyone else who has ever picked up an axe … but … (from a skills +teaching style perspective)
for example on Fusion legato (not my bag) Tom Quayle tends to be a guitarist’s guitar player, but is one such person IMHO
But surely one the finest players -anywhere - around, bar none, as an all-rounder, with a superb mastery of multiple genres, and an exceptional t teacher to boot, is the amazing Guthrie Govan. (“Scary”, as Joe Satriani puts it)
Another site of someone who is not a virtuoso (in the Steve Vai etc sense of the word) is Jake Lizzio. Why he is different is he focusses on how to compose songs and the related guitar techniques and theory to doing so - I’ve found some useful tips here.
https://signalsmusicstudio.com/