Tsavong Lah, son of Czulkang Lah, son of Cobra-Lah-Lah-Lah, was the evil, scarred, ugly, ruthless Yuuzhan Vong "warmaster" who let his inferiority complex totally ruin what was otherwise shaping up to be a successful invasion of the galaxy. In the end, he was just another warlord built up by big victories, only to be humiliated and brought down by the Jedi main characters. Just like poor Grievous.