I'd nominate the 7th on the Carne Kilmore course..... But then I would, wouldn't I.
Great list DT...
I did consider the Kilmore 7th, which incidentally I am very much hoping to play next Sept, as the 16th on my listing when taken in combination with the front-9 of The original 18, if you get my drift.
I also thought about the 2nd hole on the Kilmore but reckoned the sand blow-outs, especially the one on the right, side could be deemed a bunkers.
Another Irish hole I considered was the par-3 7th-16th on the Scumore 9-hole course at Enniscrone, which is bunkerless, and was part of the main 18-hole course until Donald Steele revised it when the hole became part of the Scurmore-9. When I was at Enniscrone a few locals I spoke with suggested to me that the 7th-16th hole on the Scurmore is probably the best hole of the entire 27 holes available to play there. More food for thought for next Sept.
I also thought of including the 3rd hole on Steele's revised Enniscrone course, another bunkerless par-3.
Atb