Since no one has posted a recent tier list, and I'm slow at work I thought I would take the liberty of upsetting some people. This tier list is based on the best variation used for each character depending on the matchup.
*No particular order in each tier*
S: Sonya, Takeda, Sektor, Sub Zero, Shinnok, Mileena
A+: Jason, Kitana, Ermac, Quan Chi, Smoke, Kano
A: Cassie, Predator, Reptile, Goro, Liu Kang, Cyber Sub, Scorpion, Bo'Rai Cho
B+: Kenshi, Jacqui, ?Johnny Cage?, Alien, Tanya, Tremor, ?Leatherface?, Kung Lao
B: Kotal Kahn, Raiden, Erron Black
C: Kung Jin, Ferra/Torr, D'Vorah
D: Cyrax, Jax
I admit I am not a guru so there will be obvious things people are gonna want changed, please comment and explain somewhat so I can update this as it's out.