is the chaucer did justice with the characters as he presented in "Cantbuary Tale".

The narrative is so famous and characters so vibrant that I'd say he did do justice to them. Many of the comic tales have an undoubtedly serious side or incur serious consequences (the broken arm that John the carpenter suffers during his fall from grace, for example, in the Miller's Tale) and serious tales can often similarly have comic, or ironic moments.