Yea, you need to get forward...
...I'm running the exact same tire setup, except with Eclipse instead of Stan's. The Python doesn't have a tremendous amount of sidewall bite, but I live with them because of their weight and rolling resistance. When entering the corner, try leaning out over the bar a little to load the front end, this will help that tire bite a little bit better. Also, try focusing on the exit of the turn throughout. I was having a terrible time cornering a couple of years ago until I got this tip. It is amazing how much smoother and how much more speed you can carry through the corners when you do this.
As far as the Racing Ralph goes, I tried that setup as well, with the RR front and Python rear. The Ralph that I bought had a slightly warped casing and, in turn, caused a bit of a wobble so I only used it for a couple of races. While I felt that it had a little better sidewall bite, it wasn't earth-shattering enough to live with that little wobble. I ended up going back to the Airlights front and rear.