Zakdorn

The Zakdorns are a minor Federation race that actually make two brief appearances in Star Trek: The Next Generation.

TNG "Peak Performance"

In preparation for the first Starfleet combat exercise in living memory, the USS Enterprise receives a Zakdorn advisor/observer named Kolrami, who will report on the crew's performance. This episode establishes the Zakdorn reputation for having the greatest innately strategic minds in the galaxy. Kolrami establishes his credentials by easily defeating both Commander Riker and Data in a game called Stratagema. Later, when the combat exercise becomes a genuine crisis due to the unforeseen arrival of a Ferengi pirate ship, Kolrami proves to be quite useless. Closing out the show, Data forces Kolrami to concede a Stratagema rematch by switching his tactics from trying to achieve victory conditions to maintaining a stalemate, taking advantage of his android endurance to outlast the Zakdorn.

TNG "Unification"

A Federation surplus depot is managed by a Zakdorn named Dokachin.