Potential face claims for Fenrir Greyback:

NAME: Dave Legeno
DATE OF BIRTH: 12 October 1963 (RIP)
NATIONALITY: British
EYE COLOUR: blue
HAIR COLOUR: grey/brown

NAME: Tom Hardy
DATE OF BIRTH: 15 September 1977
NATIONALITY: British
EYE COLOUR: blue
HAIR COLOUR: brown/black/blonde

NAME: Jason Momoa
DATE OF BIRTH: 1 August 1979
NATIONALITY: American
EYE COLOUR: brown
HAIR COLOUR: brown

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

NAME: Patrick Petitjean
DATE OF BIRTH: 1984
NATIONALITY: French
EYE COLOUR: blue
HAIR COLOUR: brown

NAME: Maximiliano Patane
DATE OF BIRTH: unknown
NATIONALITY: Argentinian
EYE COLOUR: brown
HAIR COLOUR: brown

NAME: Mads Mikkelsen
DATE OF BIRTH: 22 November 1965
NATIONALITY: Danish
EYE COLOUR: brown
HAIR COLOUR: grey/brown/blonde/black

(suggested by kencbi)