Tier lists from Arcadia... put together by Umehara (Ryu match-up list) and Yoru yoru (overall list), so check it out. Unfortunately this time around theres no real explanation for the overall list, because the entire article is dedicated to the match-up tier list put together by Daigo.
Overall Tier Rank
S Rank: Sagat
A Rank: Ryu, Akuma, Zangief
B Rank: M.Bison, Rufus, Balrog, C.Viper, E.Honda
C Rank: Abel, El Fuerte, Dhalsim, Chun-li, Ken, Blanka
D Rank: Guile, Vega
Ryu Match-up tier
4:6 Disadvantage: Sagat
5:5 Neutral: M.Bison, Balrog, Dhalsim, El Fuerte, Blanka
6:4 Advantage: Akuma, Zangief, C.Viper, E.Honda, Abel, Chun-li, Ken, Guile, Vega, Rufus