I don’t know Keoghan very well as an actor beyond his work in Dunkirk and The Killing of a Sacred Deer.
I hope so; it’s a great role for the right actor, and potentially an awesome television series.
Neither of his characters there are very Yorick-esque, but perhaps he has untapped reserves of Yorickyness we have yet to see.
Apart from no mention in THR’s report of Dr. Mann, the other key character from Vaughn and Guerra’s series, that’s pretty much all the main people in Y, at least at the start of the series, which suggests FX is taking a pretty faithful approach to the material.