I definately wouldn't consider Jodie Sweetin the cast member with the most success. All she has done is make a few guest appearances in a show shows and thats it. She's kind of faded away, as bad as that may sound.
I would say the only real big work of hers was Full House. Before it, she was a little young to do too much, and not much went on for her elsewhere during the show either. I don't think there really were any notable role of hers outside of guest appearances. It's kind of sad in a way, because she was such a charismatic little girl when she started.
And with all that considered, I don't think you could call what has happened to her acting career a success story at all. Outside of the Olsens, none of them really got that much success out of it really. I'll still stick with Bob though.