Maybe Hibria, Adramelch, Helstar, and Holy Martyr. I'm not exactly sure how those bands sounded in their early days, but the bands I listed are pretty good power/speed/heavy metal bands.
I'm also gonna throw out The Lord Weird Slough Feg if you haven't already heard of them, just because they do have some folk/power metal tendencies within their traditional, usually fast, heavy metal.