[@Feijao]

From those two Henry is the better choice. Though if you want my two cents I think Elizabeth bathory the most notorious female serial killer whose obsession with retaining her youth caused her to die would work. Or my personal favorite Edmond Dante's from count of monty Cristo as he was a beloved husband and father till he was wrongly convicted thus giving him the obsession of getting revenge he became the count. When he killed the one who incarcerated him he ended up losing his family forever since all he wanted was revenge and when he finally obtained it he lost everything else that matter, big fan of the story ;)