I mean, actors do get assigned localization voices that are used across movies in the German localization industry. So if the voices you associate with those actors are their German localized voices, those are their voices to you.
I am in no position to judge if that is true for Shrek.
(BTW, the German word for fear is Schreck [not a perfect translation, but the same spirit], yet I never made the connection mentioned in the article. Cool!)
Hard to say what kind of shrek we would have had today if he had made it.