"epitome of his" is grammatically correct and can be used in written English.
It is typically used to describe someone as a perfect or prime example of something. Example: Tom is the epitome of his father, sharing the same work ethic and determination.
The epitome of his tainted inheritance, as he himself comes to realize, is his vocation.
The epitome of his work, as he saw it, was an ordeal.
Ben Arfa's driven ball to Papiss Cissé at the back post was the epitome of his effectiveness and the Senegal striker met it perfectly to open the scoring.
Projected as the heir to Michael Jordan as the N.B.A.'s next marquee attraction, Carter in the past week seemed to be the epitome of his team: not quite ready for the rarefied air of the playoffs.
Several of J. S. Bach's fugues in The Well-Tempered Clavier, often regarded as the epitome of his genius, use themes taken from earlier works.
Erasmus already knew much about Valla and had even written an epitome of his most influential book, the Elegantiae, a guide to the writing of good (that is, classical) Latin.
As Hitler is now regarded as the very epitome of evil, his authorship suggests that Mein Kampf must also be the most evil book in the world.
On the other, his eventual fate makes him a male epitome of pathos, and his punishment is a disproportionately extreme reversal of how he made Diana feel.
I'd even suggest that Milton might turn in his grave at the prospect of his epitome of evil being played by Faceman from the A-Team movie.
Carragher, the epitome of loyalty during his years at Liverpool, did not specify which agent he was referring to.
Mr. Riley, the epitome of calm with his salt-and-pepper hair and reading glasses, said that a call-in show provided the same sort of release as the pressure cooker that his mother used to steam collard greens.
