Well heres my vote but its a bit of a cheat but the "man fromTrim" was allowed so I hope I won't be disqualified.
Kathleen Lynn was a feminist, socialist and nationalist. A medical doctor, she assisted hunger-striking suffragists. She was chief medical officer in the Irish Citizen's Army in the 1916 Rising. She established St Ultan's Infant Hospital with Madelaine French-Mullen in 1919. For a period, the establishment was entirely staffed by women.
(Originally from mayo)
Well it would be difficult for me to say, so many to chose from, and I don't even know about the Dubs from before the 70s, but I would have go with Barney Rock.
Old Mr. Brennan
I voted for Padraig Pearse - (you can vote on the Dubliner website)
Respect to the poster who mentioned Jim "lugs" Brannigan - he would have been my number 2 vote
James Joyce - would have been a close 3rd