Potential face claims for Poppy Pomfrey:

NAME: Gemma Jones
DATE OF BIRTH: 4 December 1942
NATIONALITY: British
EYE COLOUR: blue
HAIR COLOUR: greying/blonde

NAME: Michelle Williams
DATE OF BIRTH: 9 September 1980
NATIONALITY: American
EYE COLOUR: brown
HAIR COLOUR: blonde/brown

NAME: Arantza Ruiz
DATE OF BIRTH: 18 April 1997
NATIONALITY: Mexican
EYE COLOUR: brown
HAIR COLOUR: dark brown

NAME: Octavia Spencer
DATE OF BIRTH: 25 May 1970
NATIONALITY: American
EYE COLOUR: dark brown
HAIR COLOUR: black

NAME: Alfre Woodard
DATE OF BIRTH: 8 November 1952
NATIONALITY: American
EYE COLOUR: brown
HAIR COLOUR: brown

NAME: Léa Seydoux
DATE OF BIRTH: 1 July 1985
NATIONALITY: French
EYE COLOUR: blue
HAIR COLOUR: blonde/brown/black/blue

NAME: Thandie Newton
DATE OF BIRTH: 6 November 1972
NATIONALITY: British
EYE COLOUR: hazel
HAIR COLOUR: black

NAME: Mia Wasikowska
DATE OF BIRTH: 14 October 1989
NATIONALITY: Australian
EYE COLOUR: brown
HAIR COLOUR: blonde/brown

NAME: Laura Carmichael
DATE OF BIRTH: 16 July 1986
NATIONALITY: British
EYE COLOUR: brown
HAIR COLOUR: blonde

(suggested by kencbi)