1- Pink Floyd
2- Yes
3- Radiohead
4- Air
5- Neutral Milk Hotel
6- Los Hermanos
7- Mutantes
8- Emerson, Lake & Palmer
9- The Doors
10- Sigur Rós
Honorable mentions: Queen, Jethro Tull, Portishead, Focus, Kraftwerk, Kid 606, Fatboy Slim, Gram, Skank, The Seatbelts, The Beatles, Derek and the Dominoes (mostly for "Layla"), Angra, Sagrado Coração da Terra, Banco del Mutuo Soccorso, Equilibrio Vital, any progressive rock band from latin america or italy from the early 70s.