Most of Lincoln's other mistakes were appendages to this big one. Had he lived to serve out his second term, we may have had a very enlightened Reconstruction Era rather then the near disaster which resulted from the radical faction wanting to punish the south.
I believe Lincoln was a great president, and would rate him as #4 after Washington, Jefferson and Reagan . . . with a possibility to drop to #5 once history delivers the verdict on Donald Trump. Still, not a bad legacy.
Lincoln started the federal government’s power growing out of control and started an unjust war on the south over tariffs and control over US westward expansion (despite the rhetoric). I put him near the bottom of the list of presidents, personally.