I have a 17.75" right calf, and 16.75" left calf (muscle atrophied after an injury and due to no feeling in that leg since the accident, I am unable to bulk it back up to match the right side), and find the Noble Outfitters peddies fit really well, and Dreamers & Schemers fit reasonably well (they fit better under my breeches than over them, but they don’t cut off circulation or anything).
Even though they fit a bit snugger than the peddies, I like the D&S socks the best. The padded foot of the peddies goes up a bit too high for my foot size, and the transition between leg and foot creates a bump right in the tightest point of my tall boots’ ankle, and can cause blisters on longer rides or if I walk more than from stall to mounting block in them. The D&S are the same thickness the entire sock, so there is no transition line to cause that issue. I also like that the D&S have black soles (no discolouration from insoles in boots/shoes, or from walking on dirty tackroom floors when changing footwear) and a black cuff, so they’re inconspicuous if they poke a bit out of the tops of boots if you like wearing them over your breeches. They also don’t pill the way nylons sytle bootsocks tend to after washing or extended wear, which is nice.
D&S also recently released a custom sock designer on their website that allows you to create your own designs, and going custom is only a buck or two more than their regular designs.