I have enjoyed all the Lakelands I have tried.The only ones I have bought 500 g at a time are Ennerdale and Kendal Flake.
In terms of my "always have a pound in reserve" blends,I will send you to TR.
Anything in my favorites list that can be bought in bulk fits this category. Amphora Red for example, I used to buy in the tubs/cans. It is pouch now and I don't keep it around so much.