Countess Constance Markievicz
>born into wealth and privilege, became a socialist
>born into the nobility, became a republican
>born a prod, became a catholic
She grew up before women had the vote and by her death had become the first woman MP in the UK and (possibly? I've seen conflicting reports) the first female cabinet minister in the world. Funnily enough, Theresa May recently wanted to honour the first woman ever elected MP by hanging a portrait in the House of Commons, presumably not knowing that same woman had fought the British army.
She died penniless in a public ward after having spent all her money running soup kitchens. 300,000 lined the streets for her funeral.