A list of at least 11 anti-abolitionists?I researched it, but it seemed impossible to find.
Depends what you mean by anti-abolitionists. If you mean pro-slavery there are hundreds. If you mean those who worked directly against the abolition movement, it may be a little more difficult to research, but let me get you started.
Senator John C. Calhoun of South Carolina, one time Vice President and ardent states' rights advocate. He worked politically to defeat abolitionists' goals.
John Breckinridge, the Democratic candidate for President from the South in the election of 1860, an ardent support of slavery who ran a campaign based on protecting it.
Edmund Ruffin - South Carolinian newspaper editor who argued for protecting slavery and for secession for 20 years before the Civil War. Fired the first shot on Fort Sumter.
Nathan Bedford Forrest - Yes, of Forrest Gump fame, haha, or vice versa. He was a southern cavalry commander who before the war was a slave dealer. He started his own military unit to fight abolition and the North.
Jefferson Davis - President of the South and a slave owner of a large plantation. Led his state out of the union and was the leader of the rebellion to protect slavery.
Chief Justice Roger B. Taney - of the Supreme Court, wrote the majority opinion on Dred Scott vs. Sanford in 1857 and defended slavery from the bench.
That will get you started both with names and a type of person to start searching for.