Grant. He ran 4 or 5 complete armies and personally directed the operations in VA. Never lost a battle..except some might say the wilderness, except the wilderness was one continous campaign.
Took Lincoln that long to learn to stay the hell out of the way.
Grant actually did lose every battle in the Overland Campaign of 1864. From Wilderness to Cold Harbor.
He just failed to realize he was suppose to retreat afterwards. He retreated forward.
But having lost more men in the campaign than in the whole of Lee’s army, when it comes to numbers, he lost. When you look at it at who held the field after the battle, Grant lost. Grant never did actually ‘beat’ Lee in a battle until after the Army of Northern Virginia left the trenches in April 1865, almost a year after Grant took over.
After that he just won the war.
Grant’s strength was that he didn’t panic. He could pay the ‘Butcher’s Bill’ with his troops better than any other Union Commander. Meade, on the other hand, would have also finally beaten Lee, but, he would have not gotten quite so many folks killed while doing it.