Plenty of other talent out there. Donckerwolke was a name I'd run into maybe one out of ten name drops; the Stinger names are Albert Biermann, Geoffrey Guillaume, and Peter Schreyer.
Kia's head designer is Harim Kabib (who came over from BMW).
Donckerwolke was the overall head of design for Genesis, Hyundai and Kia, having taken over for Schreyer (who may step back into a more active role now, at least on a temp basis), and due to his wide breathe of responsibility, actually didn't pen many designs.