The Queen Mother was English, I believe, certainly moreso than anyone in the family she married into. Prince Philip may be half-Greek by ancestry and not just by family residence. The family is a mishmosh, but they are mostly German with English contributions by the Queen Mother and Princess Diana.
I think you're right about the Queen Mother -- another decent English girl taken in by that 'German lot'. (Perhaps I am prejudiced slightly as the descendent not only of six veterans of the War for Independence, but (illegitimately) of John Lackland and (legitimately) of two of the barons who stood surety for Magna Charta)