According to bestseedbank.com seed and strain reviews (which I find to be pretty reliable)
Highest Yield rating (9+) …
9 – Cannabis Sativa Slang from Sativa Seedbank
9 – Clingon from Enterprise Seeds
9 – Americano from Enterprise Seeds
9 – Supreme Skunk from British Columbia Seed Co.
9 – Kolinahr from Enterprise Seeds
9 – Mendocino Madness from British Columbia Seed Co.
9 – Five-O from British Columbia Seed Co.
9 – K2 from Homegrown Fantaseeds
9 – Green Giant from Brothers Grimm
9 – Aurora from Chimera
9 – Manolito 1 from Goodhouse Seeds
9 – Betazoid from Enterprise Seeds
9 – Himalayan Gold from Green House Seeds
9 – Swiss Bliss from Paradise Seeds
9 – Northern Lights #5 from Canadian Genetics
9 – Blue Berries from Black Label Seeds
9 – Golden Skush from GN03 Collection
9 – Heavy Duty Fruity from T.H. Seeds
9 – Tpol from Enterprise
Seeds
9 – Blaze from British Columbia Seed Co.
9 – White Himilayan Haze from GN03 Collection
9 – Green Spirit from Dutch Passion
9 – Red Devil from Green House Seeds
9 – Skunk #1 from Dutch Passion
9 – Hawaiian Sativa from Federation Seed Co.
9 – Isis from Dutch Passion
9 – Big Mac from Federation Seed Co.
9 – Arctic Sun from Flying Dutchmen
9 – Early Durban from Flying Dutchmen
9 – Original Big Bud Super Skunk from High Quality Seeds
9 – The Pure from Flying Dutchmen
9 – Pot of Gold from Flying Dutchmen
9 – Crown Royal from Federation Seed Co.
9 – Durban from Sensi Seeds
9 – Early Pearl from Sensi Seeds
9 – Hollands Hope from Nirvana
10 – Full Moon from Sativa Seedbank
10 – Frost Bite from Chimera
10 – Early Skunk from Sensi Seeds
10 – Jamaican Pearl from Sensi Seeds
10 – Sensi Skunk from Sensi Seeds
10 – Fruity Juice from Sensi Seeds
10 – Marleys Colley from Sensi Seeds
10 – Annapolis Royal from Canadian Genetics
10 – Critical Mass Seeds from Mr Nice