Alien Warrior

The only ones I can think of the hand are predators Predator (duh), the Klingons in "Star Trek" series, the Mandalorians "Star Wars" and the Krogan "Mass Effect" game . All you can all thing?

Wookiees, the Orges of "Lord of the Rings," Decepticons and Autobots in "Transformers," the monkeys "Planet of the Apes." That's all I can come up with yet.

The Borg from Star Trek. You will be assimilated.

"They were conducting this conversation to a very high level" Ernest Hemingway. "Adventures of a Young Man"

The Andorian could be a race of warriors (they are certainly represented in this way in "Enterprise".
The Kilrathi Wing Commander.
Elites and the Brutes from Halo.
The Jaffa Stargate (my favorite).
The Wraith for SGA.
And of course, a case can be made for the greatest evil-*** in the universe, the human race.