R2D2 and C3PO from "Star Wars" (1977)
Star Wars films gave us two very different representations of the good bot with R2 beeping and whirring as a means of communication while 3PO (programmed for human-cyborg relations) blithered away in a clipped British accent, showing us that even robots could be scatterbrained chatterboxes. This dynamic, quirky duo saves the day multiple times in each Star Wars film.