I'm not as pale as some of the rest of you (bout NW 20), but I'm VERY sallow skinned/ olive-ish... I have a terrible time getting warm/yellowish hued foundations that are pale instead of just ORANGE - just a nice subtle creamy PALE golden is nigh on impossible to find in the UK without going high-end... so I do totally sympathise with the difficulty in finding natural-looking foundations that folks paler than myself must experience...
From checking out a few different ranges, I'd strongly recommend looking at fyrinnae mineral foundation if you're paler than me. I've found my match - "Sunstone", which Fyrinnae class as a "medium" - after trying a few different samples, but I was amazed and JUST how pale some of the "pale" category shades- "Topaz" (which Fyrinnae describe as a "medium light" shade), for example - were.
Moonstone (described on the Fyrinnae site as "lighter than drugstore brands' 'ivory' shade), Opal (pink-toned ultra pale) and Pearl (very pale yellow toned) might well be worth checking out for the truly pale, and the sample service is a cheap way of experimenting with a few different shades (as I did).
http://www.fyrinnae.com/product_info...products_id=96
Personally I use either mineral makeup or Studio Fix in the summer and Clinique Superfit makeup in the winter, IMHO Clinique are the best manufactor of pale, warm foundations that I've found so far, particularly given that my skin is also quite oily and Clinique offer a range of foundations for my skintype, while most other manufacturors do not.
Hope this helps