Agreed on Rock Hall of Fame.
Grape had some great tracks...the guitar and voices on 8:05 are superb. Jerry Miller, named by Rolling Stone as one of the top 100 rock guitarist....yet so few know them.
Another great guitarist that people have heard but have no idea who he is: Wayne Perkins.
Played lead guitar on the Stones "Black and Blue" album, played lead guitar on "Call Me the Breeze" by Lynyrd Skynyrd, played with Bob Marley, and a long list of others. http://en.wikipedia.org/wiki/Wayne_Perkins