Outside of rural New England and Utah (mostly Mormons - who originated in Upstate NY and are their own thing really), there are few people of wholly English ancestry anymore. They're not really a distinctive group anymore. I don't know if anyone - except older WASP New Englanders maybe - would identify as a Yankee today.
I don't even really think people would have identified themselves as "being Yankee" within the confines of the group as defined by Phillips. It was always more of a name given to them first by their enemies or later by various historians/demographers/political science authors, which Phillips is arguably all three.
I made the comparison on discord a while back, that the Mormons are the closest equivalent to what the Yankee North was like, just trading out the specifics of the Mormon faith for say Congregationalist or Baptists or what have you. The high value placed on education, personal responsibility, self improvement, and until very recently, a good deal of political moralism as well (CA 2008 comes to mind).