Egypt population 116 million. They have 0 Olympic track medals. Their best records are 8:21 steeple and 1:44.9 800; the rest are DIII or worse level.
Also, Turkey has only one Olympic track medal; 400H Bronze. Population 84 million. They have some good records: 1:44.0, 3:31, 13:00, 2:04. Actually, they match up pretty well with the brits as far as times go.
Nigeria population 236 million. They have 7 track medals, all in sprints or sprint relays. 14:15 and 29:04.