I have just bought a new foundation as I really struggle to find one that matches my very pale skintone,most turn an unattractive shade of orange/yellow on my skin.The new one is Revlon Beyond Natural skin matching make-up and I am very happy with it.It comes out of the tube white and then changes colour to match your skintone.It doesn't provide heavy coverage for blemishes etc but you can easily use a concealer for that.
The best foundation I ever used was Maqui Douceur by Lancome, but they discontinued it years ago. I managed to locate it in Dublin and bought up all their supplies which kept me going for a good while. I am now using just a concealer by Helena Rubinstein, but again, it is no longer sold in England.