The Best Vibrato in the Business of Guitar is George Bellas.
Check out this song called “Cyclone.”
You can hear it on Spotify, as well as the rest of his music, or you can also go to his website www.GeorgeBellas.com and take lessons from him personally.
This is a complete master and this is true in every sense of the word.
Vibrato must be trained in isolation. This means not connected to a lick. Just work your Vibrato in isolation and you will be better off when you try to pull it off in context.
Slow down and concentrate.
Practice with the metronome or drum beats at different tempos.
Lento and grave, then andante and up to prestissimmo.
Try 5 minutes of Vibrato with a Metronome.
Try wide Vibrato, narrow Vibrato.
Then you can work Vibrato with pinch harmonics and other phrasing techniques such as slides or bends.
You can try a short scale run of no more than 3 to 4 notes, maybe even 5 or 6 and you can finish off the lick with Vibrato.
Practice with quarter bends, half bends and whole plus half bends.
My teacher used to say Vibrato separates the good players from the not so good.
In my opinion, that depends on whether the music is good too right?
Best thing to do I believe is to work your Vibrato and not worry about whether Vibrato is gonna make or break you.
I’ll leave you with this:
Simply work on it. Hard work on the guitar pays off.