Lincoln=governed during a racist, slave state rebellion
Reagan=President while United States was a super power and governed during a period of relative prosperity
And did so at the height of the 'Cold War' and he destroyed the biggest single threat to freedom around the world - The Soviet Union - without firing a shot.
"...and governed during a period of relative prosperity."
Are you forgetting that he took office after the Peanut President and had to deal with the high inflation, high interest rates and high unemployment. We gained prosperity after his tax cuts while fighting a Democrat Congress. We regained our prestige in the world at his hand while fighting the communists.
Don't dismiss Reagan so lightly or try to elevate Lincoln by disparaging Reagan.