2. Clayface: Tony Todd
Clayface at this point in the universe will likely just be a giant blob, hardly ever going into a a human form. Because of this, I think that Tony Todd would be perfect, has he has such an imposing voice. This is a voice that he has previously lent to Zoom on The Flash, and I think that lending it to Clayface as well would just attract more attention to the Batwoman series.
I want all the Batman villains to be part of the Batwoman series, even for Bruce Wayne to come back, also Commissioner Gordon, Barbara Gordon, Lucious Fox