As I stated in the initial post, Herbert Hoover was a proto-RINO. He was a "compassionate Conservative" long before that term was widespread. But, of course, what little remained of his Conservatism was fatally compromised by his desire for "social justice". If Hoover were around in the 21st Century, he may still be a nominal Republican but of the John Huntsman squishy strain.
I think of Hoover as another Jack Kemp. Good-hearted but misdirected.