The Founding Fathers believed different things but they were mostly "Deists" and didn't like fundamental theology guiding Constitutional principles. They certainly weren't Anarchists because the Constitution is government based. They weren't Libertarians because they did not believe in the privatization and diminution of government as do Grover Norquist, Ayn Rand, Paul Ryan or Ron Paul. BTW, this is hypocritical of Libertarians because many believe in government control on certain social issues such as abortion, anti-gay, and military intervention (the last Ron Paul excluded). Ron Paul is an advocate of the John Birch Society and if you don't know who they are, you should.

Tom Paine's "Age of Reason" will give you an idea of who the Founding Fathers were.

Anarchists and Radicals are not the mirror image of Reactionaries or Libertarians, that is a false equivalency. There is no legitimate Middle-of-the-Road position either.
Each entity here believes in different ideologies and they are not similar.

The only possible similarity is that they have their own adamant ideologies which because of their differences must come into conflict.