Huh, I thought I read that was Samuel L. Jackson. But it really doesn't matter, since finding a voice actor to do a reasonable approximation of any character is always an option.
The real question is, are the kids who will be the target audience for an animated Star Trek series interested in the likes of Riker and Troi? Do they even know who they are? The kids will want to see the same characters they've been seeing in the movies they've actually been to.