Mmmmmm, some pretty good choices. They sound more like meals than snacks to me. Sausage with Scotch Seville marmelade and biscuits (egg with it) is more of a full meal. But old strong Canadian cheddar with biscuits and marmalade is a snack that tastes so good that it expands into a meal.
Some favorite snacks-
A good creampuff and Guatemalan-Mexican coffee at 10AM.
A good tamale at 4PM.

The former are available here, but no good tamales. The best I remember were sold by a street vendor, in corn husks wrapped in hot towels and packed in a lard bucket.

A sliced banana with milk and brown sugar.