Some recent commanders that might want to consider this card in the 99 include Ellivere of the Wild Court and Galadriel, Light of Valinor
Not to mention that most decks that took advantage of these cards didnt even use the graveyard for anything else, so you could exile anything and it wouldnt matter
I like it best in green decks that ramp out a bunch of 5+ cost threats, at which point Ugin lays waste to everything else (the ramp also helps play Ugin at a reasonable time)
The first legendary Greyjoy I chose for the set was Euron Greyjoy, the most brutal and bloodthirsty Greyjoy we saw in the show is more than deserving of granting his controller a second battle phase so the vehicles under their control can attack again
It should be interesting to note, some of the color was washed out in the earlier pieces (either due to printing technique or design), the original piece has a bit more color, which is also viewable with the Classic 6th printing
1 As Foretold