I like that Henry C. is a fan of the saga.
I think Henry C. shouldn't have tried to copy Doug C's voice. He should have just used his own. Something about it is unnatural and throws me off. Also, I just think his physical appearance is too extreme for Geralt in the books. He looks like a Greek God.
In terms of acting and personality what comes to mind is Tom Cruise or Christian Bale in the Last Samurai/Batman begins. Both are troubled young men with a death wish which what Geralt was in "The Last Wish". My ideal book Geralt doesn't need to do Doug C's voice either.
In terms of appearance, yes, he should be an athlete but wiry and not large. He should be rugged in appearance and not a beauty queen like Henry C...