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Saint Seiya had the benefits of also being an anime, as well as having an artist who can draw better than the actual author in his own style (Shingo Araki), otherwise it wouldn't have been nearly as successful (on top of other reasons that could only exist in the 80s)
>Can you get away with technical skill if you have a great art style and design sense?
I would argue Demon Slayer is an example, but her art isn't that technically bad unlike your pic
Earlier Kaneko art could be an example, but even then he's more known for his late 90s/early 2000s art than MT/SMT I and II.