I point this out often. The Words of the Declaration of Independence say that "all men are created equal", but the spirit of the Declaration of Independence says the exact opposite. The Document was written by a very prominent slave holder, it was written for 13 states all of which were slave states, and the War for Independence was led by another Slave holder from Virginia.
It is historical revisionism to assert that the Declaration was intended to create freedom for slaves. It most definitely was not created for that purpose. That is just what subsequent liberal interpretation has wrung from the words of the Document.
As a matter of fact, the Declaration of Independence references the interference with slavery as one of the causes of separation.
"He has excited domestic insurrections amongst us"Meaning Slave Rebellion.
It's ugly, but that is the actual history, not the history we wish it were. You have a point that it is against an acceptable standard of decency, but you do not have a point that it is contrary to the Declaration of Independence.
In my mind the presence of slavery in spite of the words in the Declaration is a direct contradiction to the written words. The people you mentioned, Jefferson and Washington, as well as Southern leaders and aristocrats right up to the Civil War violated the plain words agreed to by the founders. This was an error. Lincoln’s Gettysburg address and the post war Amendments corrected these obvious errors. Lincoln was a true follower of the Declaration of Independence and the prototype Republican. John Calhoun was a Democrat, continued in his erroneous ways, and served as the spiritual leader of Jim Crow Democrats. Abraham Lincoln and John Calhoun are not the same.