harmageddon is a movie so bad it would take me an hour to explain how bad it is. It's STUNNINGLY bad, and shockingly it was apparently a HUGE deal in Japan when it came out. Literally the best thing I can say about it is that it helped lay groundwork for Akira to be produced. there's not much difference in terrible between the dub and sub but the dub adds in one single line that's so amazing that I'd recommend watching it just for that.
Angel cop is a pretty infamously bad one as well, and similar to Garzey's wing, you ABSOLUTELY need to watch the dub. It's one of those dubs from the magical time where people decided that to show that it was for ADULTS that everyone needed to CONSTANTLY swear. It also features the amazing line "If that's justice, then I'm a banana!"