Mystery Americans

My detectives are given 4 clues to uncover the identity of a famous American from the past.  Clue number one is that hey are given on a tombstone the year of the person's birth and the year of death.  In addition, 3 tricky clues are given one at a time. 

Can you guess the identity of this American?

1706-1790

Clue 1:  A little "flighty"

Clue 2:  Education was "key"

Clue 3:  Inventor, writer, and speaker

Answer?

How about this one?

1880-1968

Clue 1:  Silence is NOT golden.

Clue 2:  Loves "Anne" teacher

Clue 3:  Hear no evil, speak no evil, and see no evil.

Answer?