The Definition of liberal the OP was hoping to hear was one which vindicated his own idiotic notions.
For their day the founding fathers were in fact Conservative.
The Founding Father's existed after the colonies had succeeded in separating from the King of England. They implemented the Constitution of the US which was a very conservative document for a fledgling democracy. Women had no voting rights, slaves counted as partial people, the central government retained the sole right to wage wars, mint money, etc.
Very conservative.