1. Hari Seldon (Foundation, Isaac Asimov)
2. Minerva McGonnagal (Harry Potter, J.K. Rowling)
3. Gred and Forge Weasley (Harry Potter)
4. Captain Sir Edward Pellew (Horatio Hornblower, C.S. Forester)
I'm more enamored of his character from the movies than the books (less developed in print), but he's a good man: not just a good soldier in terms of 'doing his duty', but he cares about the job he does and will bend the rules if need be. Robert Lindsay makes the father-son dynamic between himself and Horatio come through spendidly.
Speaking of whom...
5. Horatio Hornblower
Were Hornblower a cousin or brother of mine, I could see the two of us being introspective, overly intellectual, and socially awkward at parties together.
6. Brigadier McLean (The Fort, Bernard Cornwell)
The perfect affable uncle and the most humane soldier I've ever read of.
7. Violet and Klaus Baudelaire (A Series of Unfortunate Events, Daniel Handler)
One is fiendishly inventive, the other a bookworm -- what's not to like?
...aside from the hammy villain who intends to kill/enslave/otherwise discomfit them?
8. Ellie Arroway (Contact, Carl Sagan)
9. Either Remus Lupin or Gordianus the Finder (Roma sub Rosa series)
They'd both make good uncles.
10: Captains Jean-Luc Picard and Kathyrn Janeway (various books, including Mosaic by Jeri Taylor)
I like reading about ship captains the most when they have a paternal air about them -- not a patronizing one, but to the point that the reader knows they care about the people under their command. Janeway is especially noticable in this regard.