List the names of individuals whose efforts led to the abolition of the trans-Atlantic slave trade

• William Wilberforce;
• Granville Sharp;
• Thomas Clarkson;
• Ottobah Cuguano;
• The American Quakers (Society of Friends);
• Quakers/Society of Friends;
• Henry Thorton
• Fowel Buxton
• James Stephen
• Lord Mansfield
• Olauda Equiano
• Thomas Paine
• Adam Smith