What would you say is the edgiest Beatles song?

Songs of theirs that are most unlike the general pop of that time. My favorites of that description would be I am the Walrus, Eleanor Rigby, Helter Skelter, Come Together, Being for the Benefit of Mr. Kite, Strawberry Fields and Blackbird. I also like Revolution, Dear Prudence, Hey Jude, Penny Lane, I want to hold your hand and Ob La Di Ob La Da, but these are a little closer to generic pop of the era. When I say edgy and different, I don't necessarily mean in content, more in sound and style. So which of their songs are the 'edgiest' in your opinion?