You didn't specify a genre, so this list is a little far-ranging, but they're all marvelous.
Earl Klugh (Solo Guitar and Handpicked are good choices)
Laurence Juber (take your pick, Guitarist is good)
Joe Pass (Songs for Ellen)
Henry Mancini -Pink Guitar (various artists, will give you another dozen guitarists to explore)
Antonio Foriconi (Touch Wood, Meet Me in London or Acoustic Mania)
Groovemasters...about a dozen volumes in this series of acoustics guitarists playing duets
Carlos Barbosa-Lima and Sharon Isbin...Rhapsody in Blue/West Side Story (simply superb). Barbosa-Lima has some terrific solo albums as well (Impressions and Music of the Americas come to mind)
Los Angeles Guitar Quartet (take your pick, I like Spin)
Acoustic Alchemy
Tony Rice (Native American and Tony Rice Sings Gordon Lightfoot)
Christopher Parkening (Parkening Plays Bach or Simple Gifts are great, Jubilation is an undiscovered treasure)
boy, there are tons more, depending on what types of music you enjoy. Happy hunting!
