A comment came in on asking about the top Irish Rockstar Genealogist. The international list posted here mentioned that Chris Paton was the top vote-getter, population weighted, from the UK and Ireland combined. Breaking it down further:
Chris Paton is the top Scotland-resident Rockstar Genealogist. If I recall correctly he was born in Ireland;
Audrey Collins is the top England-resident Rockstar Genealogist. She was born in Scotland;
John Grenham is the top Ireland-resident Rockstar Genealogist.