Ján Hus was not a political leader. He has a legacy in has-been Czechoslovakia but the legacy is making proper spelling hellishly hard, not that of a leader.I can't say I'm supportive of the idea of Jan Hus as a leader myself. He was no doubt an influential figure in Czech history with a great number of followers, yes, but he only campaigned for reform of the Catholic church, not for some sort of political goal (like Gandhi did when leading the Indians toward independence).
If we do need a Hussite figure leading Bohemia, I would propose George of Poděbrady, a king who followed the Hussite faith. He would not be a Hussite leader for Hussite leader's sake, either - he was a capable administrator who managed to restore the kingdom from the utter devastation it suffered during the Hussite Wars, he was a remarkable diplomat and he ruled Bohemia with at the time unusual religious tolerance, seeking peaceful relations between Hussites and Catholics in the kingdom.
As for Žižka, I would nominate him for Great General spot.

Žižka is a meme, pure and simple. You make him the Bohemian leader and you'll have a Hussite civ, not a Bohemian civ. Numero uno for romantic nationalism, historically Bohemian Bin Laden.

As far as Bohemian leadership goes you ought to start with Charles the 4th.
That's the most obvious choice for a leader who is well-known and historically accomplished.