+1 on the "All Along the Watchtower". From Jimi would have to also include "Purple Haze" and "Voodoo Chile (Slight Return)"
Others I like (too lazy to link):
- "Layla" (Derek and the Dominos - Duane Allman)
- "Whipping Post" (Allman Brothers - Duane Allman)
- "Reeling in the Years" (Steely Dan - Elliot Randall )
- "Maggot Brain" (Funkadelic - Eddie Hazel)
- "That Lady" (Isley Brothers - Ernie Isley)
- "Highway Star" (Deep Purple - Ritchie Blackmore)
- "Texas Flood" (Stevie Ray Vaughn)
- "Scorpio" (Dennis Coffey; also a great bass solo by Bob Babbitt)
- "Slide" (Slave - Mark "Drac" Hicks)
- "Battle Without Honor or Humanity" (Tomoyasu Hotei)