Lastdaysofrain
One of my favorite bands, it's really just one guy. He's irish and he does a lot of work for comedies on TV like The League of gentlemen, Father ted and the IT Crowd.
He's been doing it about 12 years I believe.
You're thinking of Graham Linehan - who is a comedy writer and went to Colaiste Dhulaigh in Coolock (same University, but not at the same time) - but he hasn't worked on League of Gentlemen
The Divine Comedy is basically a one man job - fronted by Neil Hannon.
You may have got a tad confused - because part of the Divine Comedy song "Songs of Love" is used as the theme music to Father Ted - Joby Talbot did the music for League of Gentlemen