Mayday,
I have given this some thought and am ready to interject .
I like two of the three par fives at Springdale for their strategic aspects. (Yes these are Flynn renovations which follow closely but not exactly the earlier Lambert routing).
The current number four hole does not challenge the golfer so much with shot value on the first two blows but the third to a narrow skyline green, deeply bunkered on both sides and with a false front and a sharp left to right contouring,not all that evident from the fairway, gives pause to most members.
The current number twelve is reachable in two for the longer hitter but gets more and more constricted by encroaching trees in the final 120 yards so that a missed shot right or left will have a highly unlikely chance of finding the green in three. I find this aspect similar to the fifteenth at Pine. Valley, another Flynn hole, where the corridor of play gets narrower as you approach the green.
All in all I have a hard time conjuring up what I would deem truly great par fives in my mind that don't involve forced carries over some kind of Hells Half Acre complexes. However, I'm willing and ready to replay a bunch of Flynn courses so as to reevaluate the strategic merits of each and every one of their par fives.
Surely, a dismal job but I am willing to volunteer.
Malcolm