You guys realize that Lincoln was, for all intents and purposes, a tyrant. He saved the union and freed the slaves but he also stripped American citizens of their right to Habeus Corpus which allowed him to hold critics of his administration without due process. He also stripped some American citizens of their right to a jury trial and replaced it with military tribunals. Often those tribunals were so stacked in the governments favor that the defendant had no chance of being exonerated. Hundreds of citizens were sent to their deaths at the hands of those tribunals.
Lincoln was a complex man, both good and bad, but there is no way that a man who shredded the bill of rights and repudiated the ideas espoused in the Declaration of Independence should go down as our greatest President. I'd take Jefferson, Washington, Adams, Teddy Rex, Truman and Reagan before I'd even begin to consider where to place Lincoln.