One good guy in the whole mess -- the daring member of the Lord's platoon of merry men who blew his horn to warn the sleeping(?) couple of the Lord's approach. Seems to me he did that at some risk to his own well-being. All the rest of the cast were clearly self-indulgent.
The Lord, by the way, in the version Paul Clayton collated from the singing of Boyd Bolling and Finlay Adams (Wise County, Virginia), was "off in some foreign country learning the tailor's trade." Hence, it would appear that the entire tragedy stemmed ultimately from the woeful condition of Scotland's impoverished nobility. Up the rebels!