Mozart's Don Giovanni blends melodrama, dark action, and comedy. I think you probably have to see it in person to find it comic - just listening to it, Don Giovanni seems like the worst kind of human being. Cleveland Opera's production was beautiful nonetheless.
Here, I have depicted a scene from the first act: a wedding party proceeding through a plaza in front of Don Giovanni's castle. Don Giovanni stands to welcome them into his home (with nefarious intent, of course).
You can read more about the opera here.
You can listen to the Cleveland Opera performance here.