This fan made Sombra from the well made and fine animated Fall of the Crystal Empire video was PERFECT and the best version of Sombra imo that I would have loved to be the canon one. He's so threatening and fearsome as well as charismatic and manipulative in the video just like Palpatine and implied to have helped Luna embrace her darkness and play a role in Nightmare Moon (Which is a cool theory along). And his voice is very threatening and fitting for the dark villain and the battle between him and the princess was excellent.