To me 7/11 at TOC is the obvious choice.
#7 Pennard
#17 Littlestone - though I probably wouldn't nominate it for this thread
#10 Princes - a possible candidate if only because the green is incredibly harsh given the length of the hole and wind
#9 Sandwich
#6 Ballybunion Old
I think #8 is the best Ballybunion candidate
#9 Ballybunion
#9 Lahinch - the
very long green sort of wraps around the dune
Strandhill's 5th is cool because of its position and the front drop, but I think the 1st is a better green for such a reachable par 5.
#14 Nairn - wonderful green and brutal for such a long par 3
I also forgot a great candidate - Burnham & Berrow's 16th
Co Sligo's 4th - I wouldn't nominate it for this thread, but I like the hole a load.
Ciao