The Alpha Centurians were the first large ruling power in the galaxy before the Ancient Triconians came to power for 200 years. Alpha Centurians were huamniod, but generally of different porportions. There have been no reports of Alpha Centurians since before the start of the Galactic Dark Age, but recently, ambiguous reports indicate that they might not be completely extinct.
Tellarites were mostly irradicated before the Dark Age as constant casualties of intergalactic war. There was a tellarite planet near to Earth before the Triconians were invaded by the Armex, but that planet was invaded by the Armex and depoplulated as well.
Rigellians were also around before the Dark Age, and there haven't been any signs of them still alive so far. This probably has to do with the fact that archeologists report that the Ancient Triconians took a genosidal lunch break and depoplulated nearly Twelve Rigellian worlds centuries ago.
Trachnia, before it was depopulated, was filled with the most beautiful humaniods mankind ever saw. Trachnians were mostly female, all fine, and technologically advanced as well.