If you have a masochistic streak, I could point you to a couple of threads from people who are convinced that REAL Christians (such as themselves, of course) never sin. Bwahahahahahahaha! (I will attempt to refrain from mentioning the sins of pride and self-righteousness and failure to love your neighbor as yourself. Too late; I've already demonstrated my own pride and self-righteousness, darn it!)
I've also seen posts from people who claim to have "walked in the Spirit" for a period of time, and though I don't have visibility to their full lives, I might believe they have, if only for a while.