Hopeful? There's a heap of gospel and spiritual songs. But I'd like him to sing her: Green Grow the Rashe's O. It's in the DT. Search with [green grow] Sample:
The warldly race may riches chase
And riches still may fly them, o
And when at last they catch them fast
They still can ne'er enjoy them, o

Green grow the rashes, o
Green grow the rashes, o
Green grow the rashes, o
The sweetest hours that e'er I spent
Were spent among the lasses, o

And if only you could hear Dougie MacLean (or me) sing it. It's really simple, like Silent Night, but demanding a more reasonable (smaller) vocal range. I never knew there were more than three verses until a minute ago when I looked it up :)