In the comics, Brashear could probably serve the same function, too. He's supposed to be right up there with Pym, Richards, and McCoy in superscience.
But tbh, I'd want Brashear if only for the fact that he's more prominent and held in higher regard than Bill Foster ever was, both in the comics and in the bullpen. And Fishburne, I feel, has the right stature and sense of authority to play Brashear.