Tournament player fight with Ryu in about six tournaments and never placed higher then 5th. With Balrog it is easier, Blanca is not bad at all. Since i played with him i got more points in G2 Tournaments. Guile is also not bad. If you picking Ryu, Ken, Akuma or Chunli you`ll probably want to start with them. Here is a list from the unofficial fan site for the championship mode.
G1-A (TBA) GP
G1-B (TBA) GP
G1-C (TBA) GP
G1-D (TBA) GP
G1-E 15,000-??? GP
G2-A 10,000-14,999 GP
G2-B 7000-9999 GP
G2-C 5000-6999 GP
G2-D 3000-4999 GP
G2-E 2000-2999 GP
G3-A 1000-1999 GP
G3-B 300-999 GP
G3-C 100-299 GP
G3-D 50-99 GP
G3-E 0-49 GP
link
G1-A (TBA) GP
G1-B (TBA) GP
G1-C (TBA) GP
G1-D (TBA) GP
G1-E 15,000-??? GP
G2-A 10,000-14,999 GP
G2-B 7000-9999 GP
G2-C 5000-6999 GP
G2-D 3000-4999 GP
G2-E 2000-2999 GP
G3-A 1000-1999 GP
G3-B 300-999 GP
G3-C 100-299 GP
G3-D 50-99 GP
G3-E 0-49 GP
link