Dogtrousers
Kilometre nibbler
...the first one at Los Angeles...
Ah ha. That would be Ian Stark https://en.wikipedia.org/wiki/Ian_Stark
That confirms my suspicion that the Olympian Database has a pre-requisite that an athlete must have at least one gold to be included.
Which leads us to https://www.ianstarkequestriancentre.co.uk/