This is hard, because John Lennon was so varied, and such a musical trail-blazer, in some way many musicians sound like him. Lyrically the song Summerteeth screams Lennon to me. Musically I think Heavy Metal Drummer is quite Lennon-esque, but that might be due to how much I associate it with 'Good Day Sunshine' Just because both make me smile the moment I hear the opening chord in much the same manner.