If you say anybody other than the Beatles, you're wrong. Then Zep, then the Doors. No other band was as versatile with their sound as the Beatles. With "Blackbird", "You've Got to Hide Your Love Away", "Eleanor Rigby", "Strawberry Fields Forever", "Within You, Without You", "Tomorrow Never Knows", etc. you can hear that they never fall into a rut with their sound like virtually every other band.