I am really odd when it comes to this, I just play any character and I dont really care about there strengths.
It is more who I enjoy being able to play but in time that will grow old and I will be able to make a better judgement.
I would have to say Saix was the best when i first got them game. I immediatly went guest play MM just to be able to play as organization members. Later, I tested out every1 will no panels (lol) to see who is the best without any panel help and I found Saix was awesome. However, with certain panels, that has changed.
...still GO SAIX :36:
ps. Vexen is surprisingly fun to play as, his shield combos are cool =)