Kevin -
I would have to say:
Yale would be #1 for me... down hill, great landscape, large green, I thought it fit in very well as far as timing in the round
#2 would be Quaker... very different from yale. shorter, level ground, small green, deeper bunkers, aesthetically one of my favorites of all time, biggest penalty for missing the green (especially right)
#3 would actually be not from a top 100 list, Knoll West... the definition of fortress, good luck from the bunkers surrounding this green, its almost like hitting out of the left greenside bunkers at yale (crazy deep!)
#4 would be shinny... i watched a practice round in the 2004 open there from the tee, maybe, maybe 1 in 40 players was able to keep a ball on that green
old mac doesn't get ranked, when i saw it, it was mostly dirt, so its not really to give a proper opinion