I agree with a lot of the above, particularly: 'Sister Josephine' and loads of other Jake Thackray songs.
Also practically anything by Flanders and Swann.
And Victoria Wood's 'Let's Do It' ('beat me on the bottom with the Woman's Weekly' - a classic line).
But Mr Happy should not be so modest.
As mentioned in a previous thread, we were all highly tickled at Bull Bay last August with his somewhat eccentric version of 'Old MacDonald Had A Farm'.