While not super-virtuosic, the rags of James Scott do demand absolute accuracy with the constant jumping about in both hands. In some ways it's harder than the equivalent motion in classical music because precise rhythm is more critical to the effect. He also had a habit of using very full chords in the right hand, which makes things awkward. There is a particularly hard sequence of jumps in the repeat of the first strain of Quality Rag - well, not hard in the Lisztian sense, but very difficult to play while maintaining insouciance of rhythm.
Oh yes, Efficiency Rag - I find that a prize bugger of a piece to play well - really awkward skips throughout, especially in the third strain. I feel much more comfortable playing, say, the first variations of Mazeppa than I do that rag.