Personally I would stick to drawing based leaders or real picture ones.Mixing the two never looks right.
Well, with SW, that is both a little more easy, and a little more difficult. There are lots of people who do COSPLAY so you can usually find some good photos that look like what they should look like. But there are so many race, like the Dartomir witches that cannot be found with real photos...
But I DO understand what you are saying.
But even drawn images have a flavor to them that can make the picture seem out of the family.
I do not know if there is a similar kind of issue with ST or not.
Remember that the evil which is now in the world will become yet more powerful, and that it is not evil which conquers evil, but only love -- Olga Romanov.