I always thought the Harrison Ford thing was a BS fan myth. It doesn’t sound like him to me at all, so it bugs the crap out of me that it keeps being repeated.
Have Lucasfilm ever confirmed? And I mean confirmed confirmed, not just repeated the myth themselves? I know that the “Orson Welles narrated the 1976 SW trailer” lasted until just a few years ago, when I think LFL were the ones to confirm it was actually Malachi Throne…
If you want to hear just how much Ford can sound just like this trailer, watch the scenes in Blade Runner where he is pretending to be an inspector while he talks to Zhora. I am 100% convinced it is Ford. The other trailer never sounded like Orson Wells to me, but he was doing a lot of voice over work, such as Buck Rogers, about that time so I can see where some untrained ears might think it was him. Definitely was Malachi Throne.