Jody,
With what I have seen of your flock, the following is not what I would use to get a lot of color: Black, Blue, Lavender.
Since you have a white, black, and mostly wild color hens you may want one of the following: Blue wheaton if you can get a wheaton hen so you can have some nice Ameraucanas plus color in your flock. Wheaton would give more wild colors with out getting anything with blue in. A white rooster would be nice because you would get a lot of color variation also. Buff would or should work good and better if you get a buff hen also. A blue silver would also be great if you could find one of those but silver would not give you the blue mixed chicks. This is my personal opinion with out looking up any genetics possibilities.
The Blacks and Blues, Lavenders will give you too many black pullets and dark roosters. EEgger's want a mixed colored flock usually. A columbian or silver spangled EE rooster would also give you color but then you'd not have any real Ameraucanas if you wanted to hatch them seperate. Good luck in your quest and hope you can find some nice birds. Harry