I've only found one relative who's worthy of a Wikipedia page - Archibald Howard Cullen, bishop of Grahamstown, South Africa. He was my great-grandmother's cousin. I've found a lot of information about him, and he sounds like quite a character.
Whenever I add a new person to my tree I tap their name into google to see what comes up. Quite a few distant relatives were successful sportsmen on a local level, but as far as I know, none represented the country.