Star Wars droids

My top 5 droids in the Star Wars galaxy.
  1. 1.
    Anakin and Luke's R2 unit and the droid whose been responsible for some of the most important information in the galaxy. The Death Star plans, Leia's message to Obi-Wan, and half the map to Luke- All Artoo.
  2. 2.
    A deranged lunatic and former imperial droid. He gave his life in the battle of Scarrif so Jyn and Cassian could broadcast the Death Star plans to the rebellion.
  3. 3.
    The droid responsible for the other half of the map to Luke Skywalker. The droid who brought Finn and Rey into the Resistance.
  4. 4.
    A smarmy little rebel from the Star Wars Rebels tv series. A former Republic droid who joined the Crew of the Ghost after crash landing near Heras home.
  5. 5.
    He discover the imperial forces on Cloud City before anyone else, I guess? JJ Abrams later gave him a red arm, so there's that. He also translates R2 for those who can't understand them and the Ewoks believe he's a god, so that was sorta helpful. His best moment probably came in Empire Strikes Back when Chris carried him around in a back pack though.