Seven of the top 10 are from the modern era (since the FDR administration)
in this order:
First place: Eleanor Roosevelt
Third place: Jacqueline Kennedy
Fifth Place: Michelle Obama
Sixth Place: Hillary Clinton
Seventh Place: Lady Bird Johnson
Eighth Place: Betty Ford
Tenth Place: Rosalyn Carter
http://us-first-ladies.insidegov.com/stories/12004/most-influential-first-ladies#26-Complete-Ranking-of-First-Ladies
in this order:
First place: Eleanor Roosevelt
Third place: Jacqueline Kennedy
Fifth Place: Michelle Obama
Sixth Place: Hillary Clinton
Seventh Place: Lady Bird Johnson
Eighth Place: Betty Ford
Tenth Place: Rosalyn Carter
http://us-first-ladies.insidegov.com/stories/12004/most-influential-first-ladies#26-Complete-Ranking-of-First-Ladies