This is from one of those chain email things, but the info is good. These eight Presidents of the Continental Congress seem to all have profiles, but they are inconsistent, and there is no President category for them.
They were at least as important as some of the more minor US Presidents after 1789, so I think they should have a consistent category, at least.
1. John Hanson
2. Elias Boudinot (1782-83),
3. Thomas Mifflin (1783-84),
4. Richard Henry Lee (1784-85),
5. John Hancock (1785-86),
6. Nathan Gorman (1786-87),
7. Arthur St. Clair (1787-88), and
8. Cyrus Griffin (1788-89),
...all served prior to George Washington ever taking office