By the popular definition I have experienced ego death on one of the highest levels.
When I was younger, about 16, I eye balled a dose into my bong and ended up doing 120 - 160 mg and had a seizure like episode of flailing for about 1 1/2 minutes and came out in an eleysian field type world and felt I lived there forever, my body dissolved at times and I became the breeze and became trapped in the leaves of a great alien tree of spirit and wisdom. I recollected and hadn't a single thought in my head. I was completely in the now of the experience.
It Felt I Lived That Way for 100 years. And when I came down I felt weightless. My head felt like my body was no longer a burden to my mind. I lost the ability to feel hunger and thirst and lost more than 20 pounds in a month and a half. I was content until I realized what was going on. The rest is another story.
Point is by most of your definitions I have experienced ego death to an amazing degree. but I feel death is the only true ego death IMO though I will respect the popular definition
I died a mineral, and became a plant. I died a plant and rose an animal. I died an animal and I became human. Then why fear disappearance through death? Next time I shall die, Bring forth wings and feathers like angels; After that, soaring higher than angels-- What you cannot imagine, I shall be that.
Any speakings written are the purely fictional ramblings of an illiterate grande taco, and are false in the face of truth when judged by the all-father. They are in no way real.