If you can find them, there are four volumes of "Irish Country Songs" arranged for the Piano (and indeed collected) by Herbert Hughes, first decade of 20th century. John McCormack recorded a few of these, notably "The Bard of Armagh", "Star of the County Down", "Ballynure Ballad", "Next Market Day". More recently, 1960s, there's Sean O' Riada playing accompaniment to Sean O'Se (and his son Peader has recently recorded some more traditional material with Sean O'Se), these accompaniments clearly influenced by traditional modes.