I was browsing the Internet Archive until I found this pdf of more than 200mb just with sheet music of Beatles songs with all the arrangements and instruments.
I can't say if it's all their songs, or if the transcription is faithful (believe it or not, none of the Beatles knew how to read sheet music), but from what I've seen and tested, it's something very close to the original songs.
I wanted to show this because these are songs that most of us are familiar with and it's good to analyze and study them.
Hi I'm the Schizoid man