Potential face claims for Rodolphus and Rabastan Lestrange: 

NAME: Tom Mison
DATE OF BIRTH: 23 July 1982
NATIONALITY: British
EYE COLOUR: blue
HAIR COLOUR: light brown   

NAME: Kıvanç Tatlıtuğ
DATE OF BIRTH: 27 October 1983
NATIONALITY: Turkish
EYE COLOUR: blue
HAIR COLOUR: blonde - brown

NAME: Rupert Young
DATE OF BIRTH: 16 May 1978
NATIONALITY: British
EYE COLOUR: blue
HAIR COLOUR: brown  

NAME: Tobias Sorensen
DATE OF BIRTH: 2 August 1988
NATIONALITY: Danish
EYE COLOUR: brown
HAIR COLOUR: brown 

NAME: Sinqua Walls
DATE OF BIRTH: 6 April 1985
NATIONALITY: American
EYE COLOUR: brown
HAIR COLOUR: brown   

NAME: Henrik Fallenius
DATE OF BIRTH: unknown
NATIONALITY: Swedish
EYE COLOUR: green
HAIR COLOUR: brown   

NAME: Idris Elba
DATE OF BIRTH: 6 September 1972
NATIONALITY: English
EYE COLOUR: brown
HAIR COLOUR: black     

NAME: Wang He Di | Dylan Wang
DATE OF BIRTH: 20 December 1998
NATIONALITY: Chinese 
EYE COLOUR: brown
HAIR COLOUR: brown

NAME: Hong Jong Hyun
DATE OF BIRTH: 2 February 1990
NATIONALITY: Korean
EYE COLOUR: brown
HAIR COLOUR: brown     

(suggested by smxraldo-)