A handful of the some of the best GB&I greens which come to mind are
Deal
TOC
Beau Desert
Pennard
Leckford Old
Sacred 9
Dornoch
Sandwich
I played Beau Desert with Sean years ago, but I cannot see how it belongs in this list. Otherwise, it's a very good start, to which I would add:
Woking
Portrush
Lahinch
Prestwick
Machrihanish
Muirfield
North Berwick
I would certainly include Woking. Its a no on North Berwick and Muirfield for me. Beau's greens are comfortly better imo. Perhaps this is due to subsidence, but nevertheless...🙂
Ciao
Tantallon will be receiving a letter about your treachery
In all seriousness - how can you not give NB the nod? 1, 3, 7, 11, 12, 14, 15, 16 and 17 are greens worth studying. That's half the greens, and I wouldn't say any green is 'weak'. But maybe as others say, our definitions are different.
Mark - an interesting point about greens worth in relation to the rest of the course. Perhaps not worthy of studying, but ensuring greens fit the course is important.
Re NB, I would add 9 and 10.
Of the courses I have played in the UK and Ireland, in addition to Woking, Lahinch, and NB already noted, the greens at St George's Hill were excellent in terms of variety, balance, and challenge.
Re the question posed in the OP, Ballybunion, RD, and Swinley Forest are world class courses without world class greens. And in the US, CPC, Pac Dunes, Bandon Trails, and Pine Needles fit that category.
I am making a distinction between greens and green complexes to meet the OP.