Luke and Obi-Wan's beards are serviceable and appealing sure, but woefully generic. It's Valkorion's immaculately quaffed stache that really sets him apart. It adds that arrogant regality and class that others lack. When coupled with his silver fox streak and pristine hair, he's simply invincible when it comes to sheer classiness.
Luke has the grey streak, sure, but it only really adds to his "hobo hippy" aesthetic while Obi-Wans is too plain to ever hope to threaten the true Emperor.
Search your feelings, you all know this to be true.
Plagueis failed for the millionth time. If you're going to argue the excuse that the Force prevented him. I'll use the same excuse as to why Valkorion didn't absorb the galaxy.
It's nothing in comparison to Ziost, nothing at all. One is total devastation of the surface of a planet and the utter annihilation of all of the millions of Sith on the planet. The other is sheer arrogance.
Plagueis has no feats superior to Valkorion's, especially when you scale him off of the other TOR powerhouses.