Eckhart Tolle does seem to be genuinely blissed out in a state of complete acceptance. The way he tells it he went as low as he could possibly go and then snapped into a blissful state of going with the flow. He doesn’t sound phoney when he speaks.
Eric Hoffer is another case like this. He walked out into the countryside with some arsenic or similar and took some in his mouth...then he spat it out and went home elated. Colin Wilson did the same. There’s a type who reaches the worst form of suffering & then transcends it.