Jimi Hendrix--the greatest musician of the Sixties. "Purple Haze" is far from my favorite Hendrix, but this video shows his matchless, effortless technique:

https://www.youtube.com/watch?v=cJunCsrhJjg

Elmore James: "King of the Slide Guitar":

https://www.youtube.com/watch?v=aKo80b-QfK0

Ntra la porta tua lu sangu � sparsu,
E nun me mporta si ce muoru accisu...
E s'iddu muoru e vaju mparadisu
Si nun ce truovo a ttia, mancu ce trasu.