Holy crap, I just noticed I missed Donatello of all characters!
Oh well, adding one more character would only cause a slight shift in percentage. It's not meant to be a complete list or even an accurate measurement, it's just meant to show that you can't really say it's mostly Fred Wolf inspired, I even tipped groupings in favor of the Fred Wolf cartoon and I still only came up with 25-32%
Like you guys said, if I were to group in characters that aren't really individuals and scratch cameos, the results would look more like this:
Mirage, 30%
FW, 20%
Archie, 13%
4Kids, 10%
Original, 27%