Wittgenstein, unlike Heidegger, did not establish an ism. He wrote very little, and everything that he wrote was simple and clear.Books don't get much simpler than the Tractatus!
He also tells this story:
Finally, toward the end of my time in Cambridge, I ventured to speak to him. I told him I had enjoyed reading the Tractatus, and I asked him whether he still held the same views that he had expressed twenty-eight years earlier. He remained silent for a long time and then said, “Which newspaper do you represent?” I told him I was a student and not a journalist, but he never answered my question.I hope that's true.
(Incidentally, searching for Wittgenstein on philosophical journalism led me to this essay by Esa Saarinen and T. P. Uschanov, which I don't remember seeing before. Looks interesting.)