as not aware of his Self.

There is nothing contained in this that says the ego dies with Self-realization, nor do the Advaitists ever define "ego."  Ego is undefinable because iof it not a thing, an entity, but a group of processes, such as thinking, feeling, tactile, smell, judging rates of motion, adapting to problems, functioning in everyday life, interpersonal relations, mathematics ability, writing ability, athletics, etc.

But buried within our inner experience is the sense of Self, the I Am Alive core which few people ever realize or experience as the core of their life, their sense of me, or I Am.

Buddha never discovered the Self and therefore there is no room in the subsequent 2,500 years of Buddhist thought, except for Zen where they speak of the inner man of no rank.

But Ramana experienced Self as an entity, as himself and also as the Father, for he left home and went to Arunachala to do his father's work, his Self's work, with Self experienced as the divine other, which is also his own Self.

So very few understand Ramana, because he himself later became covered by, enamored by Advaita philosophy and adopted it as his own understanding. Ramana lost  his way in concepts, and almost everyone who followed Ramana became lost in those concepts on the world is unreal, body is unreal, and Self is the only real and that Self is divorced from the world and everyday experience.