What general surrendered at the end of the civil war?

Robert E. Lee surrendered the Army of Northern Virginia to U.S. Grant. As these two oficers both occupied the post of General-in-Chief of their respective armies, this was taken as the end of hostilities.

It was actually a couple of weeks later that Joe Johnston's Army of Tennessee surrendered to Sherman, and there were small skirmishes West of the Mississippi for a few weeks beyond that.

Appomattox was only an armistice. There was never a peace treaty, since Congress did not recognise the Confederacy as a sovereign nation.

This is to point out that "The Confederate Army" as a whole never surrendered.

Instead the Confederate forces surrendered piecemeal and not at the same time:

Lee surrendered on Apr. 9, 1865.

Johnston surrendered on Apr. 18, 1865.

Richard Taylor's remnant Confederate Forces in Alabama and Mississippi surrendered on May 4, 1865.

Kirby Smith's Trans-Mississippi's Confederate Forces surrendered on May 26, 1865.

Indeed I am of the opinion that the question should have been better asked, for instance: "Who were the generals who surrendered the different Confederate Armies to Union Forces?"