John Lennon

According to this article from Dolphin Music, "Another fuzz pedal the Beatles have used was an WEM Pep Rush, reportedly used on the Paperback Writer recordings. There is a photograph, taken around that same era, shows Lennon fiddling with the Pep Rush fuzz pedal." Another photograph can be found here.

This article from Dolphin Music says that in this image a Vox Tonebender can be seen bottom right, on top of the amp head.

According to This article from Dolphin Music, "One of the first fuzzboxes invented was the Maestro Fuzztone, and the Beatles have used it. It can be seen on some photographs that seem to be dated from the 1963-1964 days."

"Purchased a Triangle Big Muff in August of 1971 in New York, but it is unknown if he ever recorded with one."

John Lennon used the Dallas-Arbiter England Fuzz Face during the "Let It Be" sessions, as evidenced by the circled item in the provided photo.

John can be seen using a Vox wah pedal during the Let It Be recording sessions.