Richard Griffiths was 58 in Harry Potter and the Order of the Phoenix when he played the character 'Vernon Dursley'.
That was over 17 years ago in 2007.
In 2013 he died aged 65, starring in 57 films in his career, 11 of those after Harry Potter and the Order of the Phoenix was first released. If he were alive today he would be 76.
In Harry Potter and the Order of the Phoenix, I think Richard Griffiths looks: