In the past, I transcribed and transferred a bunch of Garcia solos, rhythm figures etc. over to mandos. If a rhythm section (bass/drums) gets into a Dead-ish groove/shuffle, I can pull off a decent Garcia guitar impression, especially with electrics.
Workingman's Dead: "Dire Wolf", "Black Peter", "Uncle John's Band"
Grateful Dead (Skull & Roses):"Wharf Rat", "Me & My Uncle" "Big Boss Man", "Goin Down The Road Feelin' Bad"
Garcia: "Loser", "Sugaree", "Deal", "Bird Song"
Europe 72: "China Cat Sunflower", "I Know You Rider"
American Beauty: "Candyman", "Ripple", "Friend of the Devil"
not "Dead" songs per se, but their cover versions
NH