alwayson: Madyamakha is not the highest Buddhist philosophy, nor is it the be-all-end-all of Buddhist philosophy, it's the beginning of Buddhist philosophy. There's a reason why the Prajnaparamita sutras are not considered ekayana, but sutras such as the Lankavatara, the Lotus, and the Avatamsaka are. There's a reason why the Buddha spoke the Mahayana Mahaparinirvana sutra. Madyamakha philosophy is good for understanding the basics of why one shouldn't hold to one extreme view or the other, and for a basic understanding of shunyata, but it's nowhere near enough to take one all the way to enlightenment. If one takes the stance that the Madyamakha philosophy is the only way to understand Buddhism, you're missing the forest for the trees. You're missing the spirit of what the Buddha taught. Using upaya, he taught both non-self and self, he taught both non-existence and existence. The point, of course, is to transcend such dualistic ways of thinking.
A fundamentalist Buddhist. I've met some before, but normally either Theravada or Nichiren, but a Tibetan fundamentalist Buddhist? This is a first for me. I've never met a Tibetan Buddhist who holds to such extreme views as yours, nor have I ever read any of the Tibetan masters who did. But like I said, to each their own. If this is your path to enlightenment, then so be it. Just remember, the Buddha taught that there are 84,000 different dharma doors, not just one.