Washington believed in a strong central government and the doctrine of implied powers. He consistently chose Hamilton's interpretation of the Constitution over that of Jefferson and Madison. Reading Federalist #10 has nothing to do with Washington's views on the Constitution. What he did as President does.
Washington's views on the Constitution are included, briefly, in the debate. But as for "Democracy" (Federalist #10)? You must be kidding if you think that Washington was more in favor of "Democracy," than Madison. Nowhere did Washington suggest that the suffrage be extended--or that the provision of the Constitution, which left the extent of the suffrage up to each State, both for that State and for voting for Federal Offices in that State--be changed.
We did not have anything even approaching universal male suffrage in Washington's life. Even 25 years later, most White males did not have the suffrage. The big explosion came between 1824 and 1828, but not all States participated then, either.