[Heyworth]

The Confederacy of course had Judah Benjamin, who would later become a Senator in Louisiana

Benjamin's senate term was before the Civil War. After the war he fled to England, afraid of being implicated in the Lincoln assassination (which he almost certainly was). He died in Paris and is buried there.

[Texas Mulerider]

After the war he fled to England, afraid of being implicated in the Lincoln assassination (which he almost certainly was).

I would certainly be interested in knowing the name of, and a citation by, any reputable historian who has linked Judah Benjamin with either J.W. Booth or his co-conspirators.