Ronald Reagan is my favorite president for the last at least 100 years.
I think a little more favorably of Bush senior than you, I guess, although I don't disagree that he failed to carry on Reagan's march back to our original American ideals.
I don't think one can label it a dynasty unless the positions are inherited. Also, it's definitely an American tradition for the children of politicians to go into politics. The 2nd and 6th presidents are an example.
#1 - George Washington
#2 - Teddy Roosevelt
#3 - Ronald Reagan
Runners up:
Thomas Jefferson, John Adams, James K. Polk, James Madison, James Monroe, Abraham Lincoln (well, sort of).