Greatest Nerd in USA history.

Ah yes it has got to be old whatsisname, you know that guy who couldn't get a commission in the British Army so he went and started his own country. Can't get more nerdy than that. HEE HEE!

in Canadian History I'd sa Charles DeGaulle for his Quebec Libre speech.

In all history has probably got to be a Mathematician, but there are a few contenders, Maybe Napier, Can you get nerdier than inventing Logarithms? Or possibly Pascal who gave up math because his carriage crashed and he thought it was a sign from God. Or even Fermat who comes up with this great theorem and forgets to write it down.