True up to a point, Shimrod, but most singing audiences in my experience have the sensitivity not to pile into 'All Alone and Lonely' as if it were 'The Old Dun Cow'. Jim Carroll mentioned the hypnotic effect of the 'Lay the Bent to the Bonny Broom' version of Child 1 'Riddles', and that's exactly what I've found with that ballad.

If what the OP was looking for were songs to suit a determinedly hearty session of robust chorus-singing, then the ones to choose would be the comic ballads and the 'Golden Vanity' / 'Mermaid' type with a 'proper' chorus. However, a 'Cruel Mother' or a 'Cambric Shirt' might be just the thing to give the bellowing a rest and create something possibly more powerful.

It's also worth bearing in mind that many of those ballads exist in dozens of different versions, which can have quite different flavours. For instance, 'The Trooper and the Maid' (the one where the couple "jumped nimbly into the bed to see if it was easy") exists as a jolly romp - as sung by Eliza Carthy and very nicely by this gentleman - or the much more sombre version from Baring-Gould (via Roy Harris) that I've been singing for years now, which is absolutely gorgeous when a singing audience really gets into it.