As another possible Frollo choice for a movie version may I present Iain Glen.
Iain Glen
Iain Glen has been in many British shows and movies and has done stage work. The popular show he has been in include but are not limited to MI-5
Iain Glen as Ser Jorah Mormont from Game of Thrones
Now I have no shame in saying that I’m a fan of Downton Abbey and his role as the as the obsessive and possessive Richard Carlisle indicated to me that he would make a great Frollo. And when I watch Wives and Daughters 
Iain Glen as Sir Richard Carlisle from Downton Abbey
Plus he has the right look and his voice has a low, cold and threatening vibe. Another reason to cast him is like Frollo he has a sex appeal but it’s not because he’s conventionally attractive. He is defiantly a top pick for Frollo (in my mind).
Iain Glen as Vaughn Edwards from MI-5
Tell me what you think would Iain Glen make a good Frollo?
, but she was great in it(it’s one of my favorites). They only fault that she has is that she a little old for the role, as Esmeralda should be played by someone who can pass for 16 years old, but that’s if you want to adhere closely with the book and let’s face what Hunchback adapation follows the book very closely.
, who sang 
. Now I say in my preface that people could living or dead however this post is not about Dio, it actually about another person who is capable of singing very weird lyrics and makes them seem natural and yet would make well cast in Notre Dame de Paris and that person is 
and Speechless are the weirdest (lyrically). So given that he is a great singer who can sing some crazy lines and make them seem normal, I’d cast him as Frollo in Notre Dame de Paris, (He even looks a bit like 