For my money, the best steel guitarist ever was "Sneaky" Pete Kleinow, who helped pioneer country rock as a founding member of the Flying Burrito Brothers, along with ex-Byrds Chris Hillman, Michael Clarke and Gram Parsons.
He also performed with Linda Ronstadt, Jackson Browne and John Lennon.
He was also an animator, directing episodes of the original "Gumby" series, as well as writing and performing the show's theme song.
He died today at age 72, of Alzheimer's.
http://www.msnbc.msn.com/id/16533506/
Edit: moved from the IMWAN playroom to ICE