Welcome here, first.
As for your question, my favourite big date is between JLC and Lange...
Hmmmmm...Lange, with the Datograph, closely followed by JLC with the 70eme.
Then, I would say... The U.N Sonata.
The funny thing is that I didn't buy these watches for the Grande Date, but for the Alarm ( Sonata ), the 8 Days Power Reserve ( JLC Reverso 70eme ), and the Chronograph ( Datograph ).
But the other funny thing is that the Grande Date is somehting you first see on these watches.
Great post, indeed.
Best,
Nicolas