Malak was nothing compared to Revan in the appearance department. Sure Malak looked threatening enough being 7 feet tall. But Revan actually looked like you were staring into the darkside of the force. He deserved to be Dark Lord of the Sith. Though I thought Nihilus felt like an avatar of the darkside of the force. But that is a completely different topic.
Malak seemed like a homage to other major Sith Lords in the new republic era.
"There's gotta be a better way to make a living"