Jefferson didn't abolish his own personal usage of slavery, and Washington didn't free his slaves till after his death. Washington was slowly coaxed into being an abolitionist. For most of his life he wasn't, it was only towards the end that he became one. Madison owned 100 slaves during his life.
They may have opposed slavery with their words, but they certainly never got to the point of opposing it with their deeds. (Except for Washington, after he died.)
So, what is your point?
Thomas Jefferson owned 700 slaves over his life time. He freed 5 of them while alive and 5 others were freed in his will. I believe 6 of the 10 were blood relatives of Sally Hemings. After his death, the Jefferson slaves were sold to pay the massive debts that haunted Jefferson in is later years.