Richard Griffiths was 62 in Harry Potter and the Deathly Hallows: Part 1 when he played the character 'Vernon Dursley'.
That was over 14 years ago in 2010.
In 2013 he died aged 65, starring in 57 films in his career, 5 of those after Harry Potter and the Deathly Hallows: Part 1 was first released. If he were alive today he would be 76.
In Harry Potter and the Deathly Hallows: Part 1, I think Richard Griffiths looks: