David Tennant
I was reading a blog that thinks that David Tennant should be cast as Clopin. And while the blog tells the reader not to take it seriously I agree David Tennant would make a great Clopin.
David Tennant as The Doctor
Devaid Tennant is most known for his playing of the tenth incarnation of The Doctor in the BBC version of Doctor Who 
David Tennant as Barty Crouch, Jr
Tennant is cheerful, charismatic and he has a quick witty way of talking that would be perfect for Clopin. However he can also be threatening. Both of these facets are integral to Clopin’s character.
David Tennant as The Doctor
There just something about his mannerism and looks that I think make him an ideal choice for Clopin.
David Tennant
(season 9 as Vaughan Edwards), 
(Season 5 as Octavian), 
(as Ser Jorah Mormont) and 
(Season 2 as Sir Richard Carlisle).
(he plays Mr. Preston another character who is obsessively in love) it solidify the idea that he would make an awesome Frollo. Also based on his performance in Game of Thrones where he plays a Knight who is protective and secret in love with a much younger girl I really believe he would make an ideal Frollo.
