With master capes coming, I wrote down how many skillers can currently get each 120 cape (4-9 combat):
Fletching - 3
Crafting - 0
Herblore - 1
Farming - 5
Construction - 2
Cooking - 9
Fishing - 3
Smithing - 2
Agility - 2
Runecrafting - 2
Slayer - 0
Woodcutting - 4
Firemaking - 9
Mining - 2
Thieving - 1
Hunter - 1
Dungeoneering - 33
Divination - 1