Someone who is above party politics and who, ideally, isn't associated with any party.
Don't care if it's a man or a woman, or even someone who's nonbinary
But needs to be someone public enough to garner enough votes while at the same time seen as someone who isn't batsh*t crazy and likely to do something crazy while in office.
Probably a sports or music "personality" would best fit the bill of high enough profile without being tarnished by one particular party or another. Hundreds of thousands would probably vote for Nobo if he ran, and even more would likely vote for anyone besides Nobo.
Joe Brolly? Linda Ervine? John Creedon?