Janice McC, have you considered using non-batik neutrals? I've often mixed batiks with regular quilting cottons. I don't think I've ever seen a batik that is truly white.
I've decided to use black with white prints as my neutral, or at least, to start out trying that and see how I Iike it. I'm finishing pressing my fabrics tonight. It remains to be seen if I'll be able to do much cutting due to my finicky back, but I'm hopeful it will have improved enough by first clue time.