O'Connell is reharded as a great hero in Irish history. After Independence, most of the main streets in the main towns were re-named in his honour. That reflects the influence/hold of the Catholic Church in the new State as much as naything.
O'Connell was also very much a 'bosses' man and it is worth having a look at, or making reference to, his attitude in English history to his fellow Irishmen who founded the Chartist Movement -- the forerunner of the modern trade union movement. He was most unsympathetic to them in the House of Commons.
The rest of what you need for your essay is contained in the previous links. Good luck.