It is for me an almost impossible query… there are so many amazing references that I will try to list in no particular order the modern refs I would consider my favorite and if I had any of them in my collection as h only Patek it would be a tremendous privilege:
5950A
5951P black dial
5004P black stick dial
This is assuming regular production iterations only (otherwise 5004A would be a dream but it is not regular production)…