I really like shelf greens because it affords the opportunity for a dramatic shot without the negative of water or some other hazard which spells do or die.
Probably my favourite is Pennard's 11th. The target is hopelessly too narrow and with a false front, but the backboard offers some relief without being an automatic kick back.
As JNC mentions, Burnham's 8th is a good one. For those long enough, but not too long, the go for it 2nd shot on this par 5 is as good an approach shot as one is likely to see. The hole is further enhanced by short grass down the right kick off, oob on the left and a carry bunker directly in the line of play.
Depending on how one wants to define a shelf green as compared to a plateau green (seems to me that many holes are a hybrid of the two), Burnham possibly has many other shelf greens such as the 2nd, 5th, 12th, 13th and 14th.
It is rarely mentioned as a shelf green, but Deal's 6th could be considered one. You decide.
Colt also did a few clever shelf greens at Prestbury - #5.
Ciao