I'm really pale too and have spent my adult life in pursuit of the right foundation. The money I've wasted on things that are fine-ish in the shop and make me look orange when applied to the face - my neck is really white so of course most foundation with any colour looks vile. (I love Chanel lumiere - gorgeous texture - but even the palest colour is too dark for me! That's what we're dealing with.)
Bobbi Brown's luminous foundation's palest shade (alabaster, I think) and her stick foundation OO the best yet. (About £22). Did try Becca but very expensive, and 'sherbet' (palest stick foundation) a bit pinky-pale even for me.
Will watch this thread with interest.